My proposal (two for each which means six oh wow)
Sliggoo:
Name: Dragooxie
Typing: Dragon/Fairy
Stat Spread: 150/70/90/110/100/80
Abilities: Sap Sipper/Pixilate/
Gooey (HA)
New learnset: Hyper Voice, Moonblast, Dazzling Gleam, Wish, Fairy Wind, Moonlight, Baby Doll Eyes, Calm Mind, Crafty Shield, Misty Terrain, Flamethrower, Fire Blast (those two are like Goodra gets upon evolving from Sliggoo, i put it in new learnset since Sliggoo doesn't get them)
Moves removed: Power Whip, Aqua Tail, Sludge Wave, Muddy Water.
Justification/Niche: A very bulky tank with decent Special Attack stat and Pixilate allows Dragooxie to be a potent Calm Mind user. 150/90/100 bulk isn't ridiculous and access to Wish let Dragooxie heal itself or pass Wishes to its teammates to support them.
Sample set:
Calm Mind Bulky Sweeper:
Dragooxie Pixie Plate/Leftovers
Ability: Pixilate
Spread: 252 HP 252 Def 4 SpD
Bold Nature
Move 1: Calm Mind
Move 2: Hyper Voice
Move 3: Wish
Move 4: Flamethrower/Protect
Calm Mind let Dragooxie boosts its Special Attack and Special Defense so it can attempt a sweep. Hyper Voice is its main STAB move, with no immunities and great coverage unlike Dragon Pulse. Wish let Dragooxie heal itself so it can setup more in battle. Flamethrower offers coverage against Steel types not named Heatran but Protect can assure Dragooxie can heal itself with Wish at the cost of the aformentioned coverage above.
Choice Specs:
Dragooxie
Choice Specs
Ability: Pixilate
Spread: 252 HP 252 SpA
Modest Nature
Hyper Voice
Draco Meteor
Fire Blast
Focus Blast
Name: Venomigoo
Typing: Dragon/Poison
Stat Spread: 90/110/150/70/80/100
Abilities: Poison Touch/Adaptability/
Gooey (HA)
New learnset: Gunk Shot, Dragon Dance, Poison Jab.
Moves removed: Muddy Water, Fire Blast, Flamethrower
Justification/Niche: Weird evolution that turns Sliggoo into an offensive threat. 110 attack coupled with Adaptability will make you need Skarmory or Celesteela pretty much. It has also a good physical bulk letting it tank a few hits.
Dragon Dance
Venomigoo Life Orb
Ability: Adaptability
Spread: 252 Atk 252 Speed
Jolly Nature
Move 1: Dragon Dance
Move 2: Gunk Shot
Move 3: Outrage
Move 4: Earthquake
Dragon Dance and sweep. Skarmory and Celesteela sure walls this, but eh you have 5 other Pokemon...
Assault Vest
Venomgoo @Assault Vest
Ability: Adaptability
Spread: 248 HP 252 Atk 8 SpD
Adamant Nature
Gunk Shot
Outrage
Earthquake
Power Whip
Name: Gooliroach
Typing: Dragon/Bug
Stat Spread: 80/110/100/90/70/150
Abilities: Swarm/Tinted Lens/
Speed Boost (HA)
New learnset: First Impression, U turn, Megahorn, Bug Buzz, Bug Bite, Fell Stinger, Lunge, Struggle Bug, String Shot.
Moves removed: Power Whip, Sludge Wave, Fire Blast, Flamethrower, Fire Punch.
Justification/Niche: Bug/Dragon type that is able to pull out a good revenge killing potential with its blazing Speed and Tinted Lens.
Life Orb
Gooliroach @ Life Orb
Ability: Tinted Lens
Spread: 252 Atk 252 Speed
Jolly Nature
Move 1: First Impression
Move 2: Outrage
Move 3: U-turn
Move 4: Earthquake
Sunkern:
Name: Sunpalmtree (i'm bad at names wow)
Typing: Grass/Fire
Abilities: Leaf Guard/Brush Rusher/Chlorophyll (HA)
Stat Spread: 85/55/30/105/75/75
New Learnset: Flamethrower, Fire Blast, Overheat.
Justification/Niche: A special fire/grass type with good speed under the sun, pretty frail physically though. Brush Rusher doubles its speed under Grassy Terrain which makes it usable with Tapu Bulu too.
Sample set:
Sun Cleaner
Sunpalmtree Life Orb
Ability: Chlorophyll
Spread: 252 SpA 252 Speed
Timid Nature
Move 1: Fire Blast
Move 2: Solar Beam
Move 3: Earth Power
Move 4: Hidden Power Ice
Classic set of a sun sweeper, now getting STAB on Fire Blast so it can defeat opposing Grass types easily. This set's aim is to clean up weakened teams so Life Orb is used.
Brush Rusher
Sunpalmtree@Life Orb
Ability: Brush Rusher
Spread: 252 SpA 252 Speed
Timid Nature
Move 1: Giga Drain
Move 2: Fire Blast
Move 3: Earth Power
Move 4: Nature Power
Nice set. Brush Rusher doubles Speed under Grassy Terrain which makes Sunpalmtree function even outside of specific sun teams. Nature Power turns into Energy Ball under Grassy Terrain, which gives it a nice STAB to use when the healing of Giga Drain isn't necessary.
Name: Kernokern
Typing: Grass/Rock
Stat Spread: 105/75/85/30/75/55
Abilities: Sturdy/Solid Rock/Sand Stream (HA)
New Learnset: Stone Edge, Rock Slide, Stealth Rock, Recover, Spore
Justification/Niche: A kinda frailer version of Cradily physically that setup sand for its teammates and can spore its enemies.
Sample set:
Stealth Rock Setter
Kernokern
Leftovers
Ability: Sand Stream
Spread: 252 HP 252 SpD 4 Def
Careful Nature
Move 1: Spore
Move 2: Stealth Rock
Move 3: Rock Slide/Toxic
Move 4: Recover
The set that will work the most, thanks to Sand and Rock typing, it gets specially bulkier than Cradily while being able to put foes to sleep with Spore.
Name: Snowflora
Typing: Grass/Ice
Stat Spread: 75/30/75/85/55/105
Abilities: Snow Warning/Slush Rush/Refrigerate (HA)
New Learnset: Ice Beam, Blizzard, Frost Breath, Aurora Veil, Hail, Icicle Spear, Icicle Crash, Powder Snow, Hyper Voice.
Justification/Niche: A fast Aurora Veil user to patch up its low bulk, decent Special Attack stat to abuse perfectly accurate Blizzards. Can do good things with that.
Sample Sets:
Aurora Veil
Snowflora
Light Clay
Ability: Snow Warning
Spread: 4 HP 252 SpA 252 Speed
Timid Nature
Aurora Veil
Blizzard
Earth Power
Giga Drain
Hail Wallbreaker:
Snowflora @Choice Specs/Life Orb
Ability: Snow Warning/Slush Rush
Spread: 4 HP 252 SpA 252 Speed
Timid Nature
Blizzard
Earth Power
Leaf Storm
Frost Breath
Refrigerate Wallbreaker:
Snowflora
Life Orb/Choice Specs
Ability: Refrigerate
Spread: 4 HP 252 SpA 252 Speed
Timid Nature
Hyper Voice
Leaf Storm
Earth Power
Hyper Beam
Dunsparce
Name: Rumblesparce
Typing: Normal/Fighting
Stat Spread: 110/120/90/70/95/80
Abilities: Serene Grace/Tough Claws/Scrappy
New Learnset: Close Combat, Hammer Arm, Elemental Punches.
Justification/Niche: Good typing with Scrappy gives it perfect neutral coverage to abuse its 120 Attack stat. Access to Coil also let it become a bulky sweeper.
Sample set:
Coil
Rumblesparce
Leftovers
Ability: Scrappy
Spread: 252 HP, 252 SPD 4 Atk
Careful Nature
Move 1: Coil
Move 2: Roost
Move 3: Hammer Arm
Move 4: Return
Simple Coil set that abuse Scrappy. Stay away from burns though.
Name: Zombisparce
Typing: Normal/Ghost
Stat Spread: 120/80/105/85/105/60
Ability: Serene Grace/Mummy/Magic Bounce (HA)
New learnset: Will-o-wisp, Destiny bond (what else can we add, Dunsparce already gets all annoying moves he wants)
Justification/Niche: Very bulky Pokemon that annoys teams with its typing and support moves, oh yeah Magic Bounce means you can't Taunt it either unless Mold Breaker.
Sample set:
Annoying
Zombisparce@Leftovers
Ability: Magic Bounce
Spread: 252 HP 252 SpD 4 def
Calm Nature
Move 1: Will-o-Wisp/Toxic
Move 2: Roost
Move 3: Hex
Move 4: Stealth Rock
A rock setter that cannot be Taunted and can burn or toxic a foe? Yesss. Also great typing and bulk. Hex can serve as a STAB move that gets powered up if the foe is statused, but don't expect it to deal too much damage with its low Special Attack stat.
Name: Landisparce
Typing: Normal/Ground
Stat Spread: 105/126/75/69/100/90
Abilities: Sand Rush/Sand Force/
Hidden Soul (HA)
New Learnset: Thousand Arrows, Thousand Waves, Rototiller, Shore Up, Fissure, Swords Dance.
Justification/Niche: A bulky Ground type with decent Attack stat and access to Zygarde's signature move let Landisparce being a good rock setter that is able to check most common defogers usually immune to Ground such as Lati twins, Skarmory. The same access to the move gives it also a niche over Excadrill, it's main steep competition as a Sand Rush user.
Explanation: Hidden Soul is working like Stamina for Special Defense.
Sample sets:
Sand Rush
Landisparce
Life Orb/Choice Band
Ability: Sand Rush
Spread: 252 Atk 252 Speed
Jolly Nature
Thousand Arrows
Earthquake/Shore Up
Return
Swords Dance/Rock Slide
Hidden Soul Coil set:
Landisparce
Leftovers
Ability: Hidden Soul
Spread: 252 HP 252 SpD
Careful Nature
Thousand Arrows
Coil
Return
Roost/Shore Up
Stealth Rock:
Landisparce
Leftovers
Ability: Sand Force/Hidden Soul
Spread: 252 HP 252 Def
Impish Nature
Thousand Arrows/Thousand Waves
Shore Up/Roost
Stealth Rock
Toxic
Sorry for reposting again, deleted the wrong post haha. Hope it won't mind.