cant sorry trade from leafg/firer
You cant find one in emerald BUT... you can trade from FireRed/LeafGreen
You have to Trade it from fire red or leaf green.
trade trade
lucas/dawn little sister at some point will tell you she saw lavitar on news at route 206
You can't
you can't
Mt. Silver
safari zone
You need to evolve Lavitar to get a Pupitar at level 30 in Pokemon Diamond. Lavitar can be found on route 207 in the game.
migrate from firered or leafgreen
Seven island at sevault canyon.
You level it up to level 30