The Ending.
No but it is essential to trading with other games.
You finish the game by beating the Elite Four. If you beat that try to get all the Pokemon from firered, leafgreen, emerald, sapphire, ruby, and pearl.
Yes, because if you have nothing in your LeafGreen game, then what CAN you migrate to Pearl?
start with bulbasaur an finish the game (includeing n dex) and done
No you don't need it to finish your Pokemon game
To get Suicune you need to had chosen Charmender for your Starter Pokemon .Then finish the Elite Four .And
You need to trade Kadabra to make it evolve into Alakazam in Pokémon LeafGreen. To do this you need to have a friend who also has the game.
You will need to have a Firered or Leafgreen game that does have kabuto trade it to you.
Many people think that after you beat the Pokemon league and your rival, you completed the game. To finish the game totally, get every Pokemon in the kanto and national pokedex and beat the Pokemon league. It's a real challenge!
Beat the elete 4
trade
...? umm this question doesnt make sense. you do it by seeing Pokemon! all the Pokemon in the game! (no trade)