Charizard is the best choice
beat the eliet 4 and get all Pokemon
you have to beat the eliet 4 and it will appear at random if your starter Pokemon was a charmander
1. Its sevii islands not sivis islands and you have to catch at least 60 Pokemon on your pokedex and you have to beat the not at all challenging eliet 4
once you see the building you will need certin gym badges to open different doors.I also think the eliet 4 is in that buiding.
train your pokemon to level 60+ and fight them...
he is in the woods
after beating eliet 4 and champion
I beat the elite 4 with level 60,70,and 1 level 100 so approximately level 65
Catch 60 different Pokemon and obtain the National pokedex from Prof. Oak. Then go to One Island and talk to celio. You can now catch new Pokemon from another generation. There are several side-quests located in the Sevii islands (The seven Island)
you cant but you can rematch him after defeating the eliet 4 :3
You just play the game usually when you beat the Eliet 4 you have seen all the pokemon.
you don,t have to to defiet the eliet four again