Rotom is an Electric/Ghost type Pokemon. It can change into any form it takes when it fuses when an electronic device. It is also one of Professor Oak's Pokemon. When it possesses a microwave, refrigerator, electric fan, washing machine, or a lawn mower, it's type changes into Electric/Fire-type, Electric/Ice, Electric/Flying, Electric/Water, and Electric/Grass.
Gallery
All of Rotom's forms
Rotom Pokedex