Rotom (Pokémon)/Game data/Stats/Learnset/Generation IV

Form change
When Rotom changes into an appliance form, it learns a new move in the same way that other Pokémon may learn new moves upon evolving; Rotom cannot change into an appliance form if it does not learn the move. Even if Rotom forgets the special move associated with its current form, it will remain in its current form. If Rotom would change from one appliance form to another and still knows the special move of its current form, the old special move is automatically replaced with the new one. If Rotom changes to its normal form, it forgets the special move of the form it was in (if it still knows it); if the only move that Rotom knows right before reverting to its normal form is the form's special move, then that move will be replaced with.

Rotom/Mosse apprese nella quarta generazione 洛托姆/第四世代招式表