Take any 3 different types of pokemons ( graveller , starting pokemon , legendries ,walrein , kingler , luxray )
capture the legendary and train your Pokemon
train
train some electric Pokemon or just level up your Pokemon loads
To beat the game, you must train your Pokemon well, make them strong! Train, train, train!Catch all the Pokemon in the game, beat all the traniers and earn those gym badges so you can battle the Elite Four and the Champion!
Stark Mountain
You SHould train in the Kanto Reigon near Cinnabar and train up to lvl 55 to 80
You train your Pokemon, look for the Seven Sages, and try to fill up your pokedex. Trust me, this game NEVER ends.
Cheat.
Train your starter Pokemon then use it.
Visit the places you haven't been to yet in the east, train stronger, rebattle the elite four and battle the real champion, battle Cynthia the sinnoh champion in undella town, or just do whatever you want to do.
Your training for the E4? I would say Victory Road. Train to about level 47 there. Use exp. shares for Pokemon weak to rock types, like flying or fire. The champion has a level 50 Pokemon, and that's their strongest.
because you beat the game. but you can still train. and you can get more legendaries.