Pokémon Platinum Kaizo walkthrough
11 parts, one per checkpoint Pokémon Platinum Kaizo’s own documentation defines: the areas each one opens, the wild Pokémon and trainers in them, and the fight at the end of it. Everything here is read off the game’s own files, so anything it doesn’t state isn’t claimed.
Part 1: Roark split (the start)
Barry #2 (Player chose Chimchar), Barry #2 (Player chose Piplup), Barry #2 (Player chose Turtwig) and 1 more
Part 2: Gardenia split
11 areas · 41 trainers · Commander Mars (Double), Gardenia
Part 3: Fantina split
12 areas · 42 trainers · Commander Jupiter, Fantina ? (Also Appears in Room 5, Separate Fight), Fantina
Part 4: Maylene split
8 areas · 37 trainers · Barry #3 (Player picked Chimchar), Barry #3 (Player picked Piplup), Barry #3 (Player picked Turtwig) and 1 more
Part 5: Wake split
4 areas · 28 trainers · Barry #4 (Player picked Chimchar, outside of Pastoria Gym), Barry #4 (Player picked Piplup, outside of Pastoria Gym), Barry #4 (Player picked Turtwig, outside of Pastoria Gym)
Part 6: Byron split
34 areas · 99 trainers · Commander Jupiter (Fog, Double Battle), Cyrus (Fog), Barry #5 (Player picked Chimchar, on Canalave Bridge) and 3 more
Part 7: Candice split
8 areas · 50 trainers · Commander Saturn (Rain, Multi Battle With Galactic Titan), Commander Mars (Multi Battle with Galactic Terra), Candice (Hail)
Part 8: Volkner split
2 areas · 25 trainers · Volkner (Double Battle)
Part 9: Galactic split
17 areas · 116 trainers · Cyrus (Trick Room), Commander Saturn, Barry (Tag Partner, if Player chose Chimchar) and 6 more
Part 10: Elite Four split
9 areas · 29 trainers · Sinister Hooded Figure - Optional (Permanent Trick Room), Barry #6 (Player picked Chimchar), Barry #6 (Player picked Piplup) and 6 more
Part 11: areas the documentation doesn’t place
14 areas
This game's documentation doesn't say where 31 of its 481 fights happen, so those trainers are on no part of this walkthrough; they are all on the Trainers page. It also doesn't say when 14 of its areas open up, so they are listed together in the last part rather than guessed into the story.