Sorry lol I was half asleep when I asked this last night.
Gengar Lv. X:
http://pokebeach.com/media/Gengar-LV.X-Arceus-97.jpg
Gengar Prime:
http://pokebeach.com/media/Gengar-Triumphant-94.jpg
My guess would be that it is legal, since gengar prime's name is just "Gengar". However, it is commonly referred to as Gengar Prime, and that is where my confusion comes from.
Your thinking was absolutely correct. Great application of the rule that you knew. Glad we could confirm it for you!My guess would be that it is legal, since gengar prime's name is just "Gengar". However, it is commonly referred to as Gengar Prime, and that is where my confusion comes from.