[quote=@Zarkun]
I seem to recall Larvitar being able to learn Bite. In fact, I know it can for a fact. So why is that an issue? Pokemon learn moves that don't match their typing all the time. Pound and Froakie, Scratch and Charmander, Dragon Claw, and Charizard.
[/quote]

It's in the rp rules that in match battles that Pokemon can only use moves of their type. Though Dusk said it was fine to use their other natural learned type moves outside of a competitive match between players