Pumpkaboo will be small sized and come with an egg move. It will be level 52

Pumpkaboo is scared of Ghosts. If it hears weird noises that might be associated with Ghost types, it hides in its pumpkin and quivers in fear until they pass or it is given a reassuring cuddle.

It doesn't realize that it is a ghost itself, and if it is told it will probably be terrified of itself for weeks.