Along routes 15 14and 13 is where I usually train.
train your Pokemon that's it.
train your Pokemon or trade strong ones
just train your Pokemon each to lvl 55 and you should have no trouble
in leafgreen the elite four because i have evolved mine there and creuluen cave in leafgreen. and in emerald sky pillar and the elite four hoped that helped! -Drew
Seven Island if you don't include the elite four.
you catch and train Pokemon fill up the pokedex and beat the elite four
At the Elite Four or battle NPCs with Pokemon the same level as your one.
your strongest Pokemon
No its not an HM in leafgreen.
after you beat the elite four it should be roaming around ONLY if your starter is charmander
Machamp, Alakazam, Gyrados, Articuno, Ninetails, Victreebel.
Nope.