Where to train?

My team has two really good pokemon (Blaziken and Celebi), which are at levels 52 and 51 in order. My Mightyena is only level 27. where should I train it?

use exp share on mightyena at mt silver if its available

I trained in the grass right by the Safari Zone with a Lucky Egg. It has a lot of Tauros' which gives a lot of EXP. After that, I trained in Victory Road, I didn't even move rocks or anything, I just trained in the one section from where you enter so I can get out and heal my Pokemon whenever necessary. Same thing with the Safari Zone, there's a Pokemon Center right by it so it was easy to train there.

use exp.share put it on the pokemon you want to train go to the pokemon league go as far as you can until it is the level you want it to be

A great place to train later on is right in pallet town. Go fishing in the water at the south end and you can encounter lvl 40 tentacruel. They give 2000 + exp with a lucky egg.

Bu what I usually do is slap an exp share on a pokemon and fight through the e4 (which are powered up for me now) until the pokemon is about lvl 45. Then I find a gym that I've fought before that my pokemons attacks will be super effective against, and I get the leaders number and change the ds internal clock so I can fight them whenever with that pokemon. I did this using pupitar against blaine. I got like... 20000 exp every time I beat him with a lucky egg on. But my pupitar knew earthquake so he never stood a chance lol.

exp. share is better since it's the same thing as sending out Mightyena