Level-Up Pokémon

[Pixelatic]

Hello,

I'm currently facing the ghost trial and im wondering if there's a place to train my Pokémon so I can use them for this battle. I'm also asking this so I can complete my Pokedex. 

Ive battled all the trainers so I'm just looking for a place where I can battle over and over again. 

Thanks!

[CellyBean]

you have to battle wild pokemon if you beat all the trainers

[AMURICANGAMER]

go to the route right after the ice cave but right before the e4 thats where i train the pokemon are lvl 50-55 pretty close to that and just beat some sneasels and some snorunts and sandshrews or vulpix depending on what game you play