He's roaming in Sinnoh after meeting him at Fullmoon Island.
you cant catch it in platnium but you can trade it
you cant
Yes you can.
no
no ditto is there
you get it from a fossil
Catch a wild magby
You can't you would have to catch one in Pokemon Heartgold or Pokemon Soulsilver and trade it to Platnium
No, you'll have to trade it from Platnium. Which in Platnium you find it in the Rock Peak Ruins.
top of mt cornet
you continue on to the next gym
transfer it to your pal park