You have to surf up a river from the Valley windworks area.
Chat with our AI personalities
Quite simple, go to the place where there are 4 panels in a column, then go to the top one, battle the trainer, then go to the panel which leads to Mr. Fuego.
Sometimes they're in a swarm at Fuego Ironworks (ask dawn's sister after you beat the elite four)
Underground or fuego ironworks
Pokemon diamond
you cant be a Pokemon in Pokemon diamond