ALL FIRERED & LEAFGREEN EVOLUTIONS
FireRed and LeafGreen remake Kanto's evolution system on the Gen 3 engine. The base game uses Gen 1 methods: levels, stones, and trades. After beating the Elite Four and getting the National Dex, Gen 2 and 3 cross-generation evolutions unlock. Crobat, Espeon, and Kingdra become available through friendship and held item trades.
HOW TO EVOLVE POKEMON
After beating the Elite Four, fixing the Network Machine on One Island (requires Ruby and Sapphire gems from the Sevii Islands), and getting the National Dex from Professor Oak. Only then can Pokemon like Golbat evolve into Crobat, or Chansey evolve into Blissey. Before that, the game blocks cross-gen evolutions.
No. Even if your Golbat has max friendship, the game won't let it evolve into Crobat until the National Dex is unlocked postgame. Same applies to Espeon, Umbreon, and every other cross-gen evolution. It's one of FRLG's most frustrating restrictions.
Same as Gen 3: walk with the Pokemon, battle with it, use vitamins, don't let it faint. The Soothe Bell (from a woman in Pokemon Tower) speeds things up. Time-of-day doesn't exist in FRLG (no internal clock), so Espeon and Umbreon evolve based on the time your GBA thinks it is, which is normally set during Berry-program patching.
Celadon Department Store sells Fire, Water, Thunder, and Leaf Stones. Moon Stones are found in Mt. Moon and the Pokemon Mansion. The Sevii Islands postgame has additional stones in hidden locations. Pickup ability on Meowth also randomly finds them, same as other Gen 3 games.
Nothing mechanically — the methods themselves work the same on every version. What changes is how you connect to another player. On original GBA cartridges you use a Link Cable or the Wireless Adapter. On the 2026 Nintendo Switch re-release trades run over Switch local wireless, no accessory needed. The same four Gen 1 trade evolutions work on both platforms (Kadabra, Machoke, Graveler, Haunter), plus Gen 2 and 3 held-item trades (like King's Rock for Slowking) after the National Dex unlock. Cross-game trades with Ruby, Sapphire, or Emerald only work on original GBA hardware for now — Switch FRLG can't trade with the Gen 3 Hoenn titles unless and until those get their own re-releases.
Yes. The 2026 Switch re-release swaps the GBA's Link Cable and Wireless Adapter for Switch local wireless — two Switch consoles in the same room can trade without any extra accessories. Every trade evolution and held-item trade works exactly as it did on the original. The catch: you can't trade with Ruby, Sapphire, or Emerald yet, because those games haven't been re-released on Switch. Pokemon HOME compatibility is also coming in a post-launch update, adding one-way transfers from FRLG to HOME.