How far are you in the game? Victory road always works, or using your VS seeker. Or, you can EV train. You can search the information if you want to ev train. It can boost stats by a big chunk each time you level.
just train them
train it to lv 30 or so
The objective of Pokemon Diamond and Pearl is, well, the main thing, is to have fun. Pokemon is short for 'Poket Monster' which is what a Pokemon is. These mythical creatures are fun to have. The other objectives of the game is to train these 'Poket Monsters'. If you are up to the challenge to train these Pokemon, welcome to the world of the Pokemon Trainer.
You catch a ghost pokemon, preferably Gastly, and train it up until it has learnt it.
You train it so it levels up many many times, then use a pokethngemajig app that shows how Pokemon feel
give the Pokemon you want to train an exp share then put your strong Pokemon first on your team and train on high leveled Pokemon the Pokemon with the exp share should level up by itself!
You train them
Arcues Any of them it depends how you train them.
train it
Get an elekid or electabuzz and train it!
train them
Don't cheat, train!
use the exp share
elite 4
just train them
train your pocket monster really good and think about it.
You can not find them you can only train them to 50.