the best Pokemon are mewto and the rarest Pokemon ever mew.
digla
The best water type would be Kyogre but you can't get it in leafgreen you need to get one from sapphire or emerald other than that the best water Pokemon is blastoise.
The best team to beat elite 4 in Pokemon firered and leafgreen are the first six Pokemon you caught and trained
go to the rainbow islands(islands 5,6 nd 7) and capture all the pokemons......!! I knoe the best pokemons for you to catch.....mewtow in cerulean cave...you have got to surf for that.....and suicune, entei or raiku depending on which your starter Pokemon is.......entai for bulbasaur..suicune for charmendar.....and raiku for squirtle!
dragonite is the strongest dragon there is in leafgreen
I think its moltres
I guess Zapdos
Arceus is an alpha Pokemon and there is only one which is arceus
pikapoo
== == == == === ===
Gyarados
MunchingOrange