Pokémon Black 2 and White 2 - Mark 2 ** Spoilers **

Ripped the rival battles because used Google Translate to make Rival in Japanese and ctrl + f'd this source for the battles and translated the pokes: http://pokebook.jp/data/bw2/trainers.html No locations, sorry.
Rival Battle #1:
Lv. 5 Tepig
Lv. 5 Snivy
Lv. 5 Oshawott

Rival Battle #2:
Lv. 8 Tepig
Lv. 8 Snivy
Lv. 8 Oshawott

Rival Battle #3:
Lv. 20 Pignite | Lv. 18 Pidove
Lv. 20 Servine | Lv. 18 Pidove
Lv. 20 Dewott | Lv. 18 Pidove

Rival Battle #4:
Lv. 33 Pignite | Lv. 31 Simipour | Lv. 31 Tranquil
Lv. 33 Dewott | Lv. 31 Simisage | Lv. 31 Tranquil
Lv. 33 Servine | Lv. 31 Simisear | Lv. 31 Tranquil

Rival Battle #5:
Lv. 39 Unfezant | Lv. 39 Simipour | Lv. 41 Emboar
Lv. 39 Unfezant | Lv. 39 Simisage | Lv. 41 Samurott
Lv. 39 Unfezant | Lv. 39 Simisear | Lv. 41 Serperior

Rival Battle #6:
Lv. 43 Emboar | Lv. 41 Simipour | Lv. 41 Unfezant
Lv. 43 Samurott | Lv. 41 Simisage | Lv. 41 Unfezant
Lv. 43 Serperior | Lv. 41 Simisear | Lv. 41 Unfezant

Rival Battle #7:
Lv. 50 Emboar | Lv. 48 Simipour | Lv. 48 Unfezant
Lv. 50 Samurott | Lv. 48 Simisage | Lv. 48 Unfezant
Lv. 50 Serperior | Lv. 48 Simisear | Lv. 48 Unfezant

Rival Battle #8:
Lv. 55 Unfezant | Lv. 55 Simipour | Lv. 55 Bouffalant | Lv. 57 Emboar
Lv. 55 Unfezant | Lv. 55 Simisage | Lv. 55 Bouffalant | Lv. 57 Samurott
Lv. 55 Unfezant | Lv. 55 Simisear | Lv. 55 Bouffalant | Lv. 57 Serperior

I don't know what is challenge mode and what isn't, but there.
None of them are. He doesnt' change teams in Challenge mode.
He also has 2 other battles you missed that show up in the post game.
 
The two other battles are Bianca and Cheren's Unova Link battles.
No Hyu, specifically, has 2 additional battles in the post game.
Undella Town:
Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simipour:Lv62(Mystic Water) - Rock Slide,Crunch,Brick Break,Surf
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Emboar:Lv64(Charcoal) - Fire Blast,Head Smash,Hammer Arm,Scald

Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simisage:Lv62(Miracle Seed) - Rock Slide,Crunch,Brick Break,Energy Ball
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Samurott:Lv64(Mystic Water) - Hydro Pump,Megahorn,Ice Beam,Grass Knot

Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simisear:Lv62(Charcoal) - Rock Slide,Crunch,Brick Break,Flamethrower
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Serperior:Lv64(Miracle Seed) - Leaf Storm,Leaf Blade,Dragon Tail,Coil

I think the Plasma House
Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simipour:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Surf
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Emboar:Lv67(Focus Sash) - Fire Blast,Head Smash,Hammer Arm,Scald

Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simisage:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Energy Ball
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Samurott:Lv67(Focus Sash) - Hydro Pump,Megahorn,Ice Beam,Grass Knot

Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simisear:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Flamethrower
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Serperior:Lv67(Focus Sash) - Leaf Storm,Leaf Blade,Dragon Tail,Coil
 
No Hyu, specifically, has 2 additional battles in the post game.
Undella Town:
Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simipour:Lv62(Mystic Water) - Rock Slide,Crunch,Brick Break,Surf
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Emboar:Lv64(Charcoal) - Fire Blast,Head Smash,Hammer Arm,Scald

Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simisage:Lv62(Miracle Seed) - Rock Slide,Crunch,Brick Break,Energy Ball
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Samurott:Lv64(Mystic Water) - Hydro Pump,Megahorn,Ice Beam,Grass Knot

Rival Hue - Full Restore,Full Restore
Unfezant:Lv62(Scope Lens) - Facade,Aerial Ace,U-Turn,Swagger
Simisear:Lv62(Charcoal) - Rock Slide,Crunch,Brick Break,Flamethrower
Bouffalant:Lv62(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv62(Dragon Fang) - Earthquake,Fire Blast,Dragon Claw,Stone Edge
Eelektross:Lv62(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Serperior:Lv64(Miracle Seed) - Leaf Storm,Leaf Blade,Dragon Tail,Coil

I think the Plasma House
Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simipour:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Surf
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Emboar:Lv67(Focus Sash) - Fire Blast,Head Smash,Hammer Arm,Scald

Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simisage:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Energy Ball
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Samurott:Lv67(Focus Sash) - Hydro Pump,Megahorn,Ice Beam,Grass Knot

Rival Hue - Full Restore,Full Restore,Full Restore
Unfezant:Lv65(Scope Lens) - Giga Impact,Aerial Ace,U-Turn,Swagger
Simisear:Lv65(Salac Bery) - Rock Slide,Focus Blast,Acrobatics,Flamethrower
Bouffalant:Lv65(Muscle Band) - Head Charge,Wild Charge,Megahorn,Earthquake
Flygon:Lv65(Dragon Gem) - Earthquake,Fire Blast,Draco Meteor,Stone Edge
Eelektross:Lv65(Leftovers) - Wild Charge,Flamethrower,Dragon Claw,Crunch
Serperior:Lv67(Focus Sash) - Leaf Storm,Leaf Blade,Dragon Tail,Coil
Thanks, I figured that since they were the same levels of Bianca/Cheren they wouldn't require any additional translation.
 
Someone wanted me to pull out all the Plasma boss battles, so here
Achroma final story battle & ghetsis
Final Story Achroma battle & Ghetsis
Team Plasma Achroma - Full Restore
Magneton:Lv50(Eviolite) - Volt Switch,Flash Cannon,Tri Attack,Thunder Wave
Metang:Lv50 - Meteor Mash,Zen Headbutt,Rock Slide,Agility
Beheeyem:Lv50 - Psychic,Energy Ball,Calm Mind,Recover
Magnezone:Lv50 - Discharge,Flash Cannon,Explosion,Thunder Wave
Klinklang:Lv52(Balloon) - Gear Grind,Thunderbolt,Giga Impact,Shift Gear

Team Plasma Ghetsis- Full Restore
Cofagrigus:Lv50(Leftovers) - Protect,Shadow Ball,Toxic,Psychic
Seismitoad:Lv50 - Muddy Water,Sludge Wave,Earthquake,Drain Punch
Eelektross:Lv50 - Thunderbolt,Crunch,Flamethrower,Acrobatics
Drapion:Lv50 - Night Slash,Earthquake,Poison Fang,X-Scissor
Toxicroak:Lv50 - Poison Jab,Sucker Punch,Shadow Ball,Brick Break
Hydreigon:Lv52(Life Orb) - Dragon Rush,Crunch,Rock Slide,Frustration

Shadow Triad & Zinzolin
Team Plasma Dark
Pawniard:Lv46 - Metal Claw,Faint Attack,Slash,Scary Face
Pawniard:Lv46 - Metal Claw,Faint Attack,Slash,Hone Claws
Absol:Lv48 - Night Slash,Slash,Future Sight,Swords Dance

Team Plasma Zinzolin
Cyrogonal:Lv46 - Ice Beam,Reflect,Slash,Confuse Ray
Cyrogonal:Lv46 - Ice Beam,Light Screen,Slash,Confuse Ray
Weavile:Lv48 - Night Slash,Slash,Ice Shard,Metal Claw

Team Plasma Zinzolin
Cyrogonal:Lv48 - Ice Beam,Reflect,Slash,Confuse Ray
Cyrogonal:Lv48 - Ice Beam,Light Screen,Slash,Confuse Ray
Weavile:Lv50 - Night Slash,Slash,Ice Shard,Metal Claw

Team Plasma Dark
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Scary Face
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Hone Claws
Absol:Lv51 - Night Slash,Slash,Future Sight,Swords Dance

Team Plasma Zinzolin
Cyrogonal:Lv49 - Ice Beam,Reflect,Slash,Confuse Ray
Cyrogonal:Lv49 - Ice Beam,Light Screen,Slash,Confuse Ray
Weavile:Lv51 - Night Slash,Slash,Ice Shard,Metal Claw

Team Plasma Dark
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Scary Face
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Hone Claws
Accelgor:Lv51 - Bug Buzz,Giga Drain,Swift,Me First

Team Plasma Dark
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Scary Face
Pawniard:Lv49 - Metal Claw,Faint Attack,Slash,Hone Claws
Banette:Lv51 - Shadow Claw,Sucker Punch,Psychic,Will-O-Wisp


And Triad post-game
Team Plasma Dark
Bisharp:Lv65 - Night Slash,Iron Head,ローキック,Scary Face
Bisharp:Lv65 - Night Slash,X-Scissor,Guillotine,Swords Dance
Absol:Lv67 - Sucker Punch,Psycho Cut,X-Scissor,Aerial Ace

Team Plasma Dark
Bisharp:Lv65 - Night Slash,Iron Head,ローキック,Scary Face
Accelgor:Lv67 - Bug Buzz,Giga Drain,Focus Blast,Sludge Bomb
Bisharp:Lv65 - Night Slash,X-Scissor,Guillotine,Swords Dance

Team Plasma Dark
Banette:Lv67 - Shadow Claw,Sucker Punch,Psychic,Will-O-Wisp
Bisharp:Lv65 - Night Slash,Iron Head,ローキック,Scary Face
Bisharp:Lv65 - Night Slash,X-Scissor,Guillotine,Swords Dance


Other Achroma battles
Pokemon Trainer Achroma - Super Potion
Magnemite:Lv21
Klink:Lv23

Pokemon Trainer Achroma - Full Restore,Full Restore,Full Restore
Magneton:Lv72(Eviolite) - Volt Switch,Flash Cannon,Tri Attack,Thunder Wave
Rotom:Lv72(Life Orb) - Discharge,Hydro Pump,Will-O-Wisp,Substitute
Metagross:Lv72(Muscle Band) - Meteor Mash,Zen Headbutt,Rock Slide,Agility
Beheeyem:Lv72(Leftovers) - Psychic,Energy Ball,Calm Mind,Recover
Magnezone:Lv72(Wise Glasses) - Thunderbolt,Flash Cannon,Hyper Beam,Thunder Wave
Klinklang:Lv74(Balloon) - Gear Grind,Wild Charge,Giga Impact,Shift Gear


aaaand I think that's it. Might be a few other Triad battles I missed, maybe some "boss level" grunts that team up with Zinzolin but the game doesn't distinct the grunts by name or if they're in a double battle.
All the triad members are named "Dark" which says to me those aren't actual names, but just their rank like how all the Grunts are called Team Plasma Grunt
I couldn't find his World Tournament battle, so I'm guessing that it's stored with all the other World Tourney/Subway/etc trainers

Oh and fun fact, there are a number of "dummy" no data trainers with 1 level 1 Patrat probably for debugging purposes. But one of those trainers has a title and name!
Team Plasma Achroma
Patrat:Lv1

Maybe a cut battle dummied out with Patrat, maybe just someone goofing off, who knows
You didn't miss any, I double-checked it after figuring out how to get the trainer data.

EDIT: ripped all the grunt battles:
Grunts:
Lv. 16 Scraggy

Lv. 46 Scraggy, Lv. 46 Liepard
Lv. 48 Cryogonal, Lv. 48 Cryogonal, Lv. 50 Weavile
Lv. 49 Pawniard, Lv. 49 Pawniard, Lv. 51 Absol

Lv. 16 Sandile
Lv. 27 Trubbish

Lv. 30 Koffing
Lv. 30 Trubbish
Lv. 29 Grimer, Lv. 29 Krokorok
Lv. 29 Golbat, Lv. 29 Liepard
Lv. 29 Grimer, Lv. 29 Raticate
Lv. 29 Koffing, Lv. 29 Watchog

Lv. 46 Whirlipede, Lv. 46 Watchog
Lv. 47 Garbodor
Lv. 47 Weezing - Sludge Bomb, Double Hit, Explosion, Haze
Lv. 46 Krokorok, Lv. 46 Raticate
Lv. 45 Skorupi, Lv. 45 Foongus, Lv. 45 Golbat
Lv. 47 Krookodile
Lv. 47 Scrafty
Lv. 46 Koffing, Lv. 46 Amoonguss
Lv. 46 Grimer, Lv. 46 Seviper
Lv. 47 Drapion
Lv. 45 Pawniard, Lv. 45 Pawniard, Lv. 45 Pawniard
Lv. 45 Deino, Lv. 45 Deino, Lv. 45 Sneasel
Lv. 47 Scolipede
Lv. 46 Trubbish, Lv. 46 Zangoose
Lv. 46 Scraggy, Lv. 46 Liepard
Lv. 46 Whirlipede, Lv. 46 Watchog
Lv. 47 Garbodor
Lv. 47 Weezing - Sludge Bomb, Double Hit, Explosion, Haze
Lv. 46 Krokorok, Lv. 46 Raticate
Lv. 45 Skorupi, Lv. 45 Foongus, Lv. 45 Golbat
Lv. 47 Krookodile, Lv. 47 Scrafty
Lv. 46 Koffing, Lv. 46 Amoonguss
Lv. 47 Drapion
Lv. 45 Pawniard, Lv. 45 Pawniard, Lv. 45 Pawniard
Lv. 45 Deino, Lv. 45 Deino, Lv. 45 Sneasel
Lv. 47 Scolipede
Lv. 46 Trubbish, Lv. 46 Zangoose

Lv. 46 Watchog, Lv. 46 Garbodor

Lv. 44 Watchog, Lv. 44 Muk
Lv. 44 Seviper, Lv. 44 Weezing

Lv. 14 Patrat

Lv. 42 Cryogonal, Lv. 44 Sneasel
Lv. 39 Golbat, Lv. 39 Garbodor

Lv. 47 Weezing - Sludge Bomb, Double Hit, Explosion, Haze, Muk - Sludge Wave, Acid Armor, Explosion, Fling

Lv. 27 Watchog

Lv. 14 Purrloin

Lv. 45 Liepard, Lv. 45 Watchog, Lv. 45 Scolipede
Lv. 46 Golbat, Lv. 46 Drapion
Lv. 46 Seviper, Lv. 46 Garbodor
Lv. 47 Krookodile
Lv. 47 Drapion
Lv. 47 Scrafty

Lv. 46 Trubbish, Lv. 46 Golbat, Lv. 46 Garbodor
Lv. 47 Krokorok, Lv. 47 Krookodile
Lv. 46 Scraggy, Lv. 46 Whirlipede, Lv. 46 Scrafty
Lv. 47 Raticate, Lv. 47 Watchog

Lv. 45 Scraggy, Lv. 45 Krokorok, Lv. 45 Golbat

60 in total.
 
Ugh why is White 2 becoming the worst version? Black 2 gets the challenge key, better route 4 , better kyurem forme and others >_<. Btw no word on Ex TR grunt yet?
Black 2 may get the challenge key, but only White 2 really gets to enjoy it (okay and other Black 2 versions but).

The Ex Grunt is apparently still there, his kid lets you listen to the Route 10 (Unova) theme so I hear.
 
I just went through the process of using Memory Link on my Black 2 with my JP White version. Here is a quick walkthrough for anyone else interested:

1. On the BW2's main menu, select イッシュリンク (Unova Link).
2. You should be presented with three options. Select おもいでリソク (Memory Link).
3. For local wireless, select ワイヤレスで うけつぐ (Wireless Internet). For Wi-Fi, select Wi-Fiで うけつぐ (Wi-Fi Internet).
4. You should be presented with a Yes/No question. Select はい (Yes).
5. Insert your JP White/Black Version into a second DS and select Download Play.
6. Select the BW2 icon that displays your BW2 Trainer ID.
7. Continue pressing A on the second DS until the blinking cursor disappears.
8. After a few seconds, the games should connect. You will be presented with new text on the original DS. If successful, the text should read: レポートの かきこみが かんりょう いたしました. (Data has been written.) おもいでリソクが かんりょうしました (Memory Link has been completed.)
9. Enjoy the extra BW2 content!

If you have any questions about this process, send me a VM. I'm happy to help.
If you need any guidance or assistance while playing BW2, join #orangeislands on SynIRC!
 
I am sure this is still being worked on, but I will ask anyways: do we know if the Dream Radar pokemon can be shiny? Along those lines, I wonder how one will go about RNGing those pokes if they get deposited directly into your box.
 
I am sure this is still being worked on, but I will ask anyways: do we know if the Dream Radar pokemon can be shiny? Along those lines, I wonder how one will go about RNGing those pokes if they get deposited directly into your box.
Pokemon from Dream Radar is simply planted in the game's entralink, so the answer is no.

Speaking of Dreams, I can confirm Pawniard, Ducklett, and Pidove in DW. I just got enough to access the manor, so further exploration is required. There is a large possibility that Litwick will be there...
 

Kaphotics

Remodeling Kitchens
is a Researcher Alumnusis a Contributor Alumnus
the entree forest minlvl table was updated (the level you receive entralink mons is defined in a single file) for B2W2

here's the new table; should be the same compared to BW except it has data for all 649 Pokemon now!

romdata: /a/2/2/3 min pokemon levels (0-649)
 

sandman

Bum bum bum bum
is a Forum Moderator Alumnus
the entree forest minlvl table was updated (the level you receive entralink mons is defined in a single file) for B2W2

here's the new table; should be the same compared to BW except it has data for all 649 Pokemon now!

romdata: /a/2/2/3 min pokemon levels (0-649)
I vaguly recall someone posting that not all of the Unova overworld sprites were in BW2. Is that not the case or is there some other way we could download 5th gen pokemon from dream world that don't have sprites?
 
I checked the over-world sprites, and every Unova family is accounted for. Although some Pokemon are missing (e.g. Swadloon), every Pokemon family has at least one over-world sprite (e.g. Leavanny). Pokemon families that do not have an over-world sprite for their base form likely appear in Hidden Hollows.

EDIT: Just thought I would share these tips: for those of you with JP BW2, the first Breeder found in Lostlorn Forest resets every time you leave the area and reenter. He has a Liepard (2 Speed EVs) and a Tranquill (2 Attack EVs), so he is ideal for training physical sweepers. As a bonus, you receive money every time you defeat him! The same applies for the first Breeder found on Route 4: she has a Drilbur (1 Attack EV) and Marill (2 HP EVs), perfect for training bulky physical Pokemon!
 
I checked the over-world sprites, and every Unova family is accounted for. Although some Pokemon are missing (e.g. Swadloon), every Pokemon family has at least one over-world sprite (e.g. Leavanny). Pokemon families that do not have an over-world sprite for their base form likely appear in Hidden Hollows.
I don't think most of the legends have the "proper" sprites for entralink, do they? And the Unova starters don't have any at all...I think.

But I think sandman meant more that, every Pokemon is represented in the DW level table, even if they have no overworld
 
I checked the over-world sprites, and every Unova family is accounted for. Although some Pokemon are missing (e.g. Swadloon), every Pokemon family has at least one over-world sprite (e.g. Leavanny). Pokemon families that do not have an over-world sprite for their base form likely appear in Hidden Hollows.

EDIT: Just thought I would share these tips: for those of you with JP BW2, the first Ranger found in Lostlorn Forest resets every time you leave the area and reenter. He has a Liepard (2 Speed EVs) and a Tranquill (2 Attack EVs), so he is ideal for training physical sweepers. As a bonus, you receive money every time you defeat him! The same applies for the first Ranger found on Route 4: she has a Drilbur (1 Attack EV) and Marill (2 HP EVs), perfect for training bulky physical Pokemon!
Can you list all of them?
 
For Dream Radar does anyone know if

Dialga = Diamond version need to be in
Palkia = Pearl
Giratina = Platinum
Ho-oh = Heart Gold
Lugia = Soul Silver

or is it just 4th gen game = you can get whichever and it's random, but you can get them all?

Edit: Read on serebii that this was the case, but I've read else where it isn't.
Meh whichever I just miss Palkia.
 
The only ones that are really worth getting for their dream world abilities are lugia and Ho-oh. All the others have telepathy as a Dw ability, so there's no point unless you're just adding them to your pokedex :x
 
btw, simple question. Where the hell is the move relearner. I ran all over and pissed off at least 30 Super Repels trying to find that bitch. (No she is not where she was back in BW1)