Phase 2 section
Pokemon FireRed and LeafGreen Cerulean Gym Walkthrough
Cerulean Gym section for the FireRed and LeafGreen walkthrough with source-backed wild Pokemon, trainers, items, hidden items, bosses, and route notes.
Clear the swimmers and defeat Misty for the Cascade Badge. This page is a standalone section for Phase 2: Cascade Badge, with FireRed/LeafGreen source data for encounters, trainers, items, hidden items, and boss routing.
Source maps
Cerulean City Gym.
Wild rows0 Trainers3 Items1
Route plan
Grass or Electric pressure is ideal. If you chose Charmander, Route 24/25 catches are usually the stabilizer.
Route Notes
- Misty uses a Super Potion; plan damage around Starmie's bulk and speed.
Wild Pokemon
No wild Pokemon or static/gift Pokemon rows are sourced for this section.
Trainers
| Trainer | Area / position | Team | Reward | Notes |
|---|---|---|---|---|
 LuisSwimmer♂ | Cerulean City Gym | $64 | One-time or scripted battle. Map tile (10, 12); sight 1. | |
 DianaPicnicker | Cerulean City Gym | $380 | One-time or scripted battle. Map tile (4, 7); sight 4. | |
 MistyLeader | Cerulean City Gym | $2100 | One-time or scripted battle. Map tile (8, 6); sight 0. |
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| TM03 Water Pulse | Gift/scripted | Cerulean City Gym: Scripted reward from Event Script Give TM 03. | - | Scripted reward from Event Script Give TM 03. |
Boss Strategy
| Boss / branch | Team | Reward | Danger notes | Practical counters |
|---|---|---|---|---|
| MistyLeader | $2100 | Starmie is fast and uses Water Pulse confusion pressure. | Ivysaur, Pikachu, Oddish/Bellsprout lines, or a trained Nidoking/Nidoqueen answer the fight cleanly. |
Completion Checklist
- Clear the route plan for Cerulean Gym before moving to the next section.
- Check the wild table for FireRed/LeafGreen version splits, rod methods, Surf, Rock Smash, static Pokemon, gifts, trades, and event-only rows when present.
- Defeat or intentionally skip optional trainers; use VS Seeker notes where rematches are available.
- Sweep visible and hidden item rows, including key items, HMs, TMs, berries, fossils, and scripted gifts.
- Review boss cards and heal before any Rival, Gym Leader, Rocket Admin, Elite Four, Champion, or legendary encounter listed above.
Sources
pret/pokefirered:src/data/wild_encounters.json,src/data/trainers.h,src/data/trainer_parties.h,data/maps/*/map.json,data/maps/*/scripts.inc,data/scripts/item_ball_scripts.inc, andgraphics/trainers/front_pics.- Encounter odds use the FR/LG slot rates: land 20/20/10/10/10/10/5/5/4/4/1/1, Surf and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, and Super Rod 40/40/15/4/1.
- Generation III mechanics apply throughout: abilities, natures, held items, double battles, and post-game National Dex data are active in these remakes.