Pokémon Emerald walkthrough
11 parts, one per checkpoint Pokémon Emerald’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: Just started — no badges
11 areas · 56 trainers · Rival Brendan (Mudkip), Rival Brendan (Torchic), Rival Brendan (Treecko) and 3 more
Part 2: Beat Roxanne — Rustboro City Gym, badge 1
2 areas · 4 trainers · Roxanne
Part 3: Beat Brawly — Dewford Town Gym, badge 2
9 areas · 96 trainers · Rival Brendan (Mudkip), Rival Brendan (Torchic), Rival Brendan (Treecko) and 4 more
Part 4: Beat Wattson — Mauville City Gym, badge 3
11 areas · 61 trainers · Magma Leader Maxie, Wattson
Part 5: Beat Flannery — Lavaridge Town Gym, badge 4
1 area · 1 trainer · Flannery
Part 6: Beat Norman — Petalburg City Gym, badge 5
32 areas · 232 trainers · Rival Brendan (Mudkip), Rival Brendan (Torchic), Rival Brendan (Treecko) and 4 more
Part 7: Beat Winona — Fortree City Gym, badge 6
1 area · 7 trainers · Winona
Part 8: Beat Tate & Liza — Mossdeep City Gym, badge 7
7 areas · 19 trainers · Aqua Leader Archie, Tate & Liza
Part 9: Beat Juan — Sootopolis City Gym, badge 8
4 areas · 34 trainers · Juan, Champion Wallace, Elite Four Drake and 3 more
Part 10: Beat the Elite Four and the Champion
2 areas
Part 11: areas the documentation doesn’t place
11 areas
This game's documentation doesn't say where 8 of its 518 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 11 of its areas open up, so they are listed together in the last part rather than guessed into the story.