You don't.You need a male or female burmy and evolve it.One of them should evolve into a Mothim!!!! hope it helped shadow cressila.
He returns to the battle zone in the fight area
fight every trainer or TRAVEL that's what your journey is about travling to new places and discovering Pokemon
byron the sixth gym leader u fight him in canalave gym
in Pokemon diamond go to iron island and find a camper trainer and fight her
After beating the Elite Four + the Champion go to Snowpoint city and you will see rival and he will invite you to go to the Fight Area.
you have to see all Pokemon in the game (sinoh only) and the go to see rowan the profecer and oak will appear
The only way you can see all the Pokemon on diamond is by going into the GTS and global trade different Pokemon.
there is no other way
you have to catch all of the pokemon in diamond or SEE all of the pokemon
A Pokemon
The Pokemon you see do not go in your pokedex.
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