Receive a Pokemon for Christmas? Sure, I'll take a Gengar. Why? Its a ghost type, it can not be hit by normal type attacks unless use foresight and other moves similar to foresight... Lets cut the chase here mate, Gengar still has the upper advantage when facing normal types.
Gengar has been always one of my favorites, Gengar can be a dirty little sneaker, and can learn psychic moves. :D