

Feel free to post your discoveries/tips below and I will edit as we go!
Housekeeping:
- I will do my best to track Sun/Moon specifics, so please include this in your post so that I can map it accordingly.
- I will be playing Moon for the run-through.
- I hate spoilers lol. I'll include a brief summary of each location however will hide it to help those who don't want too much about any major events.
TL;DR? As much detail as possible will be added. Spoiler tab will contain information on battles, etc. Be warned.
Peace out!
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Island 1: Melemele Island
Location: Route 1
Location: Route 1
First visit is guided by the Professor. No interaction.
Points of interest: TBC
Pokemon:
Moon: [First grass area] Pikipek (~lv3), Yungoos (~lv3), Ledyba (~lv3), Caterpie (~lv3) [Elevated grass area] Pichu (lv3), Metapod (~lv4), Yungoos (~lv3), Pikipek (~lv3), Grubbin (~lv3), Spinarak (~lv3 - night)
South (of home): Slowpoke (~lv7), Rattata-A (~lv5), Wingull (~lv5)
Sun:
Items: (After receiving start) 10x pokeball, 5 potions. Potion (located NW corner of the map). Antidote (just after encountering the kid telling you about the party in Iki town, continue right on to the elevated area), potion (located north of antidote). Paralyze heal (west of entry to Iki town -- useful to heal from the Pichu in this area)
After battle, you can enter the "Care" menu where you can brush, feed, etc. Interesting as you can use the medicine to heal status conditions.
Hau'oli Outskirts
Pokemon Centre - no hidden items
Training school:
Exp Share, Potion (northern area of car park). Quick claw (Girl inside building near TV), TM01 Workup (4th trainer)
Meowth-A (~lv7), Grimer-A (~lv6), Magnemite (~lv7)
Location: Iki Town
Nothing really happens on first visit. No items or NPC interactions outside of general chit-chat. Up on the highest level of the town there is a house on the left that is blocked [Re-visit]. After the events on the "Mahalo trail" you return here and //finally// receive your starter and as you head back home, you encounter your rival, Hau -- who surprisingly chooses a pokemon that isn't super effective against you!
Pokemon: TBC
Items: Pokedex and trainer pokedex (received automatically), Z-Ring (post rival battle)
Battles: Hau (after working your way through Route 1): Pichu (lv6), Starter (lv7)
Location: Mahalo Trail
Standard follow-through up the hill where you encounter a nice cut-scene, save the day and meet the lady in white (Lillie) from the opening cut-scene.
Pokemon: TBC
Items: Sparking stone
Location: Hau'Oli City
Beachfront
Beachfront
Nothing much here for now
Pokemon: TBC
Items: Pokeball (adjacent to first steps on left)
Shopping district
Hau makes an appearance. There are plenty of these little gates that allow you to go through areas -- keep your eyes peeled. Team skull gets a mention
Pokemon:
Moon: [Through gate opposite Tourist building] Wingull (~lv5), Magnemite (~lv5), Meowth-A (~lv7), Abra (~lv6), Grimer-A (~lv6). [Gate opposite Salon through Pokecentre] Pichu (~lv6), Abra (~lv6), Wingull (~lv5), Rattata (~lv8)
Sun:
Items: Pokefinder upgrade for Rotom-dex, Lens case (from Lillie), Silk Scarf (lady left of Apparel store entrance), Heal Ball left of PokeCentre. Revive from lady sitting down in City Hall building. TM49 Echoed Voice (opposite police station), Lumiose Galette (kitchen lady, building SW corner)
Marina
Old ladies like to give young children candy? Team skull make an appearance. An unexpected battle awaits!
Pokemon:
Moon:
Sun:
Items: X-attack/X-defence (guy left of Ferry entrance, his lady friend will give you the defence)
Location: Route 2
Goal is the pokemon centre, from here you can access Verdant Cavern.
Pokemon:
Moon: Smeargle (~lv9), Makuhita (~lv9), Abra (~lv10), Meowth (~lv7), Drowzee (~lv7), Spearow (~lv9 -- can be traded for machop @ P/centre)
Sun:
Items: Nest balls (gentleman in NW-most house). Revives (from rival)
Location: Hau'Oli Cemetary
Few trainers, nothing too exciting (yet), good opportunity to add some diversity to your party.
Pokemon:
Moon: Gastly (~lv10), Misdreavus (~lv10) night only, Zubat (~lv10), Drifloon (~lv10) day only.
Sun:
Items: Antidote, potion, etc scattered around (in plain sight). TM100 Confide top right corner of cemetery.
Location: Berry Fields
Berry surprising, team skull are back!
Pokemon:
Moon: Smeargle (~lv10), Growlithe (~lv10), Spearow (~lv10), Cutiefly (~lv10), Rattata-A (~lv10)
Sun:
Items: Oran berry, Persim Berry, Silver Powder (behind house, access by walking right along the fence then walk up behind the house), Revive (delibird inside the house, along the right wall). Paralyse heal (inside pots along right of berry farm enclosure), Big Mushroom (SW most corner of the farm), Repel (yellow basket next to fertiliser box), Sitrus berry (old man you saved)
Location: Verdant Covern (1st TRIAL)
Let the hunger games begin! Fight your way through the cavern (pokemon can be caught once completed). Some unexpected surprises await! Recommend to collect Brick break before the trial.
Alolan Raticate in Moon, Yungoos in Sun.
Alolan Raticate in Moon, Yungoos in Sun.
Pokemon:
Moon: Diglett (~lv11), Zubat (~lv11), Rattata-A (~lv11)
Sun:
Items: Revive (moss-looking rock near 2nd den), TM31 Brick Break
Location: Route 3
Points of interest:
Pokemon:
Moon: Spearow (~lv11), vullaby (~lv11), Yungoos (~lv11), Mankey (~lv12) Over the bridge: crabrawler (~12) often hiding under a pile of berries.
Sun:
Items: Sharp beak (in between the 3 rocks), pretty wing (floor after sky battle w/ vullaby). Soothe bell (far right peninsula). Great ball (follow the curve down to the left) over the bridge: Pile of berries (sitrus, pecha, chesto, cheri). TM 83 infestation Rightmost ledge behind the rocks)
Location: Melemele Meadow
Lets find Dora!
Pokemon:
Moon: Cutiefly (~lv11), Petilil (~lv11), Caterpie (~lv11), Oricorio-PomPom (~lv10),
Sun:
Items: Net ball (ledge, western side), Poison barb (top-left corner, up on the ledge) Yellow nectar (glittering stars, random location -- used to change Oricorio?)
(Hidden) Location: Seaward Cave
Accessed via crawl space SW corner of the meadow. Surf required to access grass area where you can find Bagon early on.
Pokemon: Diglett-A (~lv11), Zubat (~lv12), Totodile (~lv11)
Moon:
Sun:
Items: Never-melt Ice (SE corner), Star piece (SW corner- hidden in boulder)
MeleMele Kahuna Battle:
Hala is the Island Kahuna who specialises in fighting pokemon -- Mankey/Makuhita/Crabrawler.
Location: Ten Carat Hill
Points of interest:
Pokemon:
Moon: Roggenrola (~lv11), Carbink (~lv12), Sableye (~lv10),
Sun:
Items: Few random potions, etc.
Farthest Hallow
The pokemon here call for help -- a lot!
Pokemon:
Moon: Machop (~lv12), Carbink (~lv11), Roggenrola (~lv12), Spinda (~lv13), Rockruff (~lv12),
Sun:
Items: Hard stone, Nugget, TM62 Acrobatics (head NE, follow the path clockwise back to direction of the entrance
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