NO! Just because you have beaten the elite 4 it doesn't really mean you have completed the game. You can still catch other legendarys and raise your pokemon, get another pokedex to complete and even challenge the elite 4 again if you like.
what do you mean the elite 4 are in the Pokemon league in evergrande city you should be able to beat them if you have good Pokemon
no
you have to start with squirtle and beat the elite 4
after u beat the elite four.
You don't need pokemon, you just need to beat the elite four and have the national dex (which you should get after you beat the elite four, because they have kinda rare pokes)
you have to start with Bulbasaur.then beat the elite 4.after that Raiku will become then you have to look for it
You could level your Pokemon faster
You make all their Pokemon faint and you should vary the Pokemon to their weakness types
beat the elite four and the champion.
You need to beat the elite four and then beat the Pokemon league champion
You should use either Groudon or your Starter Pokemon. I used a crobat and a garados.
Catch legendary pokemon, or just start over and play again.