[[Rotom]] possessing any device other than the usual ones (in other words, any device except an [[electric fan]], [[refrigerator]], [[microwave]], [[lawnmower]], [[washing machine]], [[Pokédex]], or [[cellphone]]).

If Rotom is seen possessing a device before it could be done in actual Pokémon media, it still qualifies as this tag. Example: In post #2110931, Rotom is seen possessing a Pokédex, but this fan work predates the actual Rotom Dex from official media.
rotom (other)