PLEASE HELP with pokemon diamond and pearl?

Question

ok i got some level 78 pokemon and a level 97 venusaur (in pokemon leafgreen) but there are some people that already have level 100 in diamond and pearl i trained them all without gameshark and i want to make em all level 100 without gameshark. so where can i train them easlily? for when diamond and pearl come out

I WANT TO BEAT PEOPLE IN WIFI THATS WHY IM ASKING

Answer 1

I think the best place to train is in the E4.
To increase you exp. gain you can try to find a wild chansey holding a lucky egg, it doubles the amount of exp gained after each battle to the pkm that is holding it.