@itoman: How funny! Gengar is my favourite and I'm actually doing a gijinka of him for AWA this year(: I wouldn't mind trying to do a Haunter one, as well! Thanks for that!
~H~: I'm liking the Lickitung suggestion more and more and plan on trying to do that costume as well :3 As for your gijinka, why not try Kirlia? Dark green wig!