You trade with Ruby Saphire or Emerald.
You cant find it in Firered only leafgreen.
Piplup does not exist in Pokemon LeafGreen or FireRed.
Lugia isn't available in Pokemon Emerald, it is available in other versions such as Soul Silver, Gold, Silver, Crystal, FireRed and LeafGreen.
Psyduck is in firered not leafgreen you can find it using a good or super rod in the safari zone.
Swablu is unobtainable in FireRed and LeafGreen; the only way to get it is to trade from Ruby, Sapphire, Emerald, Colosseum, or XD after obtaining the National Dex. You can trade a Swablu Egg or trade an Altaria and breed it if you want a Swablu with your trainer ID, but you can only find wild Swablu in other games.
ekans can be found in the end of the victory road in leafgreen. You can only find growlithe in firered. firered you can find both way easyer in firered than leafgreen so trade with firered. there is info about pkmn for all you GAMERS
You cant find it in Firered only leafgreen.
Trade from leafgreen
There aren't growlithe in LeafGreen. FireRed has growlithe, LeafGreen has vulpix.
You have to trade it from Firered/Leafgreen in Pokemon firered/leafgreen you can find zapdos in power plant, but you need surf to get there.
Piplup does not exist in Pokemon LeafGreen or FireRed.
Lugia isn't available in Pokemon Emerald, it is available in other versions such as Soul Silver, Gold, Silver, Crystal, FireRed and LeafGreen.
You can't catch misdreavous in firered only leafgreen can.
You can't find Elekid in LeafGreen, you need to trade an Electabuzz from FireRed and breed it.
Only leafgreen can get vulpix.
Firered power plant. Can't in leafgreen
Psyduck is in firered not leafgreen you can find it using a good or super rod in the safari zone.