Fusion Moves

Exclusive to Fan Generation, Fusion Moves are moves that have 2 or 3 types on it. You can find all of these moves in TM's, but they are all hidden, you can also breed Pokémon and get a Fusion Move.

Moves
Fire/Steel: Steel Fireball Grass/Rock: Mossrock Toss Water/Bug:?

Trivia
Sorry for lack of names, couldn't think of names, ideas would be appreciated.