Rotom is a electric and ghost type pokemon. it is unknown if he is a legendary pokemon or not, but judging by his abilities, it is possible. you catch him in the haunted hause in sinnoh, he is inide the tv. you must find the two ghosts two, the ghost of a girl and of a dad. it is currently unknown if that is the girl that was killed by darkrai.this girl was first well known in pokemon white version or black version.
the girls debut was in pokemon black and white 2, where she partially reveals her death to you. she gives you the lunar wing to capture cresselia