Part 1: Just started — level cap 16

Just started — level cap 16 opens 17 areas. There are 144 trainers standing in them. The fights at this checkpoint are Rival Brendan, Lilycove (Treecko), Rival Brendan, Lilycove (Mudkip), Rival Brendan, Lilycove (Torchic), and 32 more.

Where to go

1. Littleroot Town

   Wild: Pikipek 50% · Lv —, Helioptile 20% · Lv —, Sandshrew 20% · Lv —, Aipom 15% · Lv — +8 more

2. Littleroot Town Professor Birch's Lab

   Wild: Chikorita Lv —, Cosmog Lv —, Cyndaquil Lv —, Totodile Lv —

3. Route 101

   Wild: Audino 50% · Lv —, Poochyena 20% · Lv —, Zigzagoon 20% · Lv —, Corm 15% · Lv — +14 more

4. Oldale Town

   Wild: Rolycoly 50% · Lv —, Aron 20% · Lv —, Klink 20% · Lv —, Bounsweet 15% · Lv — +13 more

5. Route 103

   Wild: Magikarp 60% · Lv —, Pineco 60% · Lv —, Tentacool 60% · Lv —, Wingull 60% · Lv — +23 more

   Trainers: Twins Amy And Liv (double battle) Lv 16, Twins Amy And Liv (double battle) Lv 16, Twins Amy And Liv (double battle) Lv 16, Fisherman Andrew Lv 16, Fisherman Andrew Lv 16, Aroma Lady Daisy Lv 16 +27 more

6. Route 102

   Wild: Crawdaunt 70% · Lv —, Corphish 60% · Lv —, Surskit 60% · Lv —, Tentacool 60% · Lv — +20 more

   Trainers: Youngster Allen Lv 16, Youngster Allen Lv 16, Youngster Allen Lv 16, Youngster Calvin Lv 16, Youngster Calvin Lv 16, Youngster Calvin Lv 16 +7 more

7. Petalburg City

   Wild: Corphish 60% · Lv —, Goldeen 60% · Lv —, Marill 60% · Lv —, Swablu 50% · Lv — +20 more

8. Route 104

   Wild: Wingull 90% · Lv —, Luvdisc 70% · Lv —, Magikarp 60% · Lv —, Shelmet 50% · Lv — +18 more

   Trainers: Youngster Billy Lv 16, Youngster Billy Lv 16, Youngster Billy Lv 16, Lady Cindy Lv 16, Lady Cindy Lv 16, Lady Cindy Lv 16 +15 more

9. Petalburg Woods

   Wild: Aipom 60% · Lv —, Pikachu 60% · Lv —, Cherubi 40% · Lv —, Pidgeotto 25% · Lv — +14 more

   Trainers: Team Aqua Grunt Petalburg Woods Lv 16, Team Aqua Grunt Petalburg Woods Lv 16, Team Aqua Grunt Petalburg Woods Lv 16, Bug Catcher James Lv 16, Bug Catcher James Lv 16, Bug Catcher James Lv 16 +3 more

10. Petalburg Woods 2

    Wild: Exeggcute 60% · Lv —, Audino 50% · Lv —, Venonat 40% · Lv —, Beedrill 25% · Lv — +12 more

11. Petalburg Woods 3

    Wild: Beedrill 60% · Lv —, Poliwag 60% · Lv —, Slowpoke 60% · Lv —, Audino 50% · Lv — +17 more

    Trainers: Cooltrainer Baneful Petalburg Woods Lv 16

12. Petalburg Woods Breloom Room

    Wild: Breloom Lv —

13. Rustboro City

    Wild: Audino 60% · Lv —, Nidoran♀ 20% · Lv —, Nidoran♂ 20% · Lv —, Nidorina 20% · Lv — +8 more

    Trainers: ★ Rival Brendan, Rustboro (Treecko) Lv 16, ★ Rival Brendan, Rustboro (Treecko) Lv 16, ★ Rival Brendan, Rustboro (Mudkip) Lv 16, ★ Rival Brendan, Rustboro (Mudkip) Lv 16, ★ Rival Brendan, Rustboro (Torchic) Lv 16, ★ Rival Brendan, Rustboro (Torchic) Lv 16 +6 more

14. Rustboro City Gym

    Wild: Amaura Lv —, Blastoise Lv —, Charcadet Lv —, Corm Lv —

    Trainers: Youngster Josh Lv 16, Youngster Josh Lv 16, Youngster Josh Lv 16, Hiker Marc Lv 16, Hiker Marc Lv 16, Hiker Marc Lv 16 +10 more

15. Route 116

    Wild: Spinarak 60% · Lv —, Tyrogue 50% · Lv —, Fomantis 40% · Lv —, Purrloin 25% · Lv — +15 more

    Trainers: Hiker Clark Lv 16, Hiker Clark Lv 16, Hiker Clark Lv 16, Rich Boy Dawson Lv 16, Rich Boy Dawson Lv 16, Rich Boy Dawson Lv 16 +27 more

16. Rusturf Tunnel

    Wild: Gligar 50% · Lv —, Drilbur 35% · Lv —, Noibat 20% · Lv —, Whismur 20% · Lv — +11 more

    Trainers: Team Aqua Grunt Rusturf Tunnel Lv 16, Team Aqua Grunt Rusturf Tunnel Lv 16, Team Aqua Grunt Rusturf Tunnel Lv 16, Hiker Mike 2 Lv 16, Hiker Mike 2 Lv 16, Hiker Mike 2 Lv 16

17. Rusturf Tunnel 2F

    Wild: Magikarp 100% · Lv —, Noibat 20% · Lv —, Whismur 20% · Lv —, Chingling 10% · Lv — +7 more

★ Rival Brendan, Lilycove (Treecko) — Route 103

6 Pokémon · level cap Lv 16 (every cap) · Rival Brendan, Lilycove (Treecko)’s own page

	Pokémon	Moves
	Smeargle Lv 16 · Simple · Great Ball Also has Own Tempo, Technician, Skill Link — innates are always active · Timid nature	Seed Flare Luster Purge Dark Void Lunar Dance
	Phantowl Lv 16 · Tinted Lens · Strawberry Sweet Also has Moon Spirit, Wonder Skin, Majestic Bird — innates are always active · Quiet nature	Moonblast Dark Pulse Take Flight Moonlight
	Gyarados Lv 16 · Rampage · Protector Also has Intimidate, Draconize, Overwhelm — innates are always active · Adamant nature	Deathroll Zephyr Rush Giga Impact Wave Crash
	Goodra Lv 16 · Poison Heal · Poké Ball Also has Adaptability, Sap Sipper, Hydrate — innates are always active · Modest nature	Dragon Rage Muddy Water Karma Protect
	Pikachu (Rock Star) Lv 16 · Armor Tail · Pearl Also has Steely Spirit, Bulletproof, Rhythmic — innates are always active · Timid nature	Thunder Metallic Melody Shock Wave Surf
	Sceptile Lv 16 · Cutthroat · Normal Gem Also has Overgrow, Blur, Keen Edge — innates are always active · Jolly nature	Solar Blade Dual Chop Aerial Ace Fluttering Leaf

★ Rival Brendan, Lilycove (Mudkip) — Route 103

6 Pokémon · level cap Lv 16 (every cap) · Rival Brendan, Lilycove (Mudkip)’s own page

	Pokémon	Moves
	Smeargle Lv 16 · Simple · Great Ball Also has Own Tempo, Technician, Skill Link — innates are always active · Timid nature	Seed Flare Luster Purge Dark Void Lunar Dance
	Phantowl Lv 16 · Tinted Lens · Strawberry Sweet Also has Moon Spirit, Wonder Skin, Majestic Bird — innates are always active · Quiet nature	Moonblast Dark Pulse Take Flight Moonlight
	Gyarados Lv 16 · Rampage · Protector Also has Intimidate, Draconize, Overwhelm — innates are always active · Adamant nature	Deathroll Zephyr Rush Giga Impact Wave Crash
	Goodra Lv 16 · Poison Heal · Poké Ball Also has Adaptability, Sap Sipper, Hydrate — innates are always active · Modest nature	Dragon Rage Muddy Water Karma Protect
	Pikachu (Rock Star) Lv 16 · Armor Tail · Pearl Also has Steely Spirit, Bulletproof, Rhythmic — innates are always active · Timid nature	Thunder Metallic Melody Shock Wave Surf
	Swampert Lv 16 · Stamina · Water Gem Also has Torrent, Dry Skin, Regenerator — innates are always active · Adamant nature	Jet Punch Seismic Fist Ice Punch Flip Turn

★ Rival Brendan, Lilycove (Torchic) — Route 103

6 Pokémon · level cap Lv 16 (every cap) · Rival Brendan, Lilycove (Torchic)’s own page

	Pokémon	Moves
	Smeargle Lv 16 · Simple · Great Ball Also has Own Tempo, Technician, Skill Link — innates are always active · Timid nature	Seed Flare Luster Purge Dark Void Lunar Dance
	Phantowl Lv 16 · Tinted Lens · Strawberry Sweet Also has Moon Spirit, Wonder Skin, Majestic Bird — innates are always active · Quiet nature	Moonblast Dark Pulse Take Flight Moonlight
	Gyarados Lv 16 · Rampage · Protector Also has Intimidate, Draconize, Overwhelm — innates are always active · Adamant nature	Deathroll Zephyr Rush Giga Impact Wave Crash
	Goodra Lv 16 · Poison Heal · Poké Ball Also has Adaptability, Sap Sipper, Hydrate — innates are always active · Modest nature	Dragon Rage Muddy Water Karma Protect
	Pikachu (Rock Star) Lv 16 · Armor Tail · Pearl Also has Steely Spirit, Bulletproof, Rhythmic — innates are always active · Timid nature	Thunder Metallic Melody Shock Wave Surf
	Blaziken Lv 16 · Speed Boost · Binding Band Also has Blaze, Flame Body, Striker — innates are always active · Jolly nature	Blaze Kick High Jump Kick Stomping Tantrum Protect

Also fought around here

Everything you can have caught by this checkpoint · Open the interactive guide

This game's documentation doesn't say where 249 of its 1715 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 8 of its areas open up, so they are listed together in the last part rather than guessed into the story.