CyberCubed said:
Shuppet. Ash needs a Ghost Pokemon.
But you gotta remember, Harley has a Jupetta. Sure, it could stay unevolved, but Satoshi hasn't really been doing that since AG started. Heigani's the only exception (and Pikachu, of course), and even he manages to be a powerhouse with his hard shell and brute strength. I just don't see a Kagebouzu being in Heigani's situation. And though there's nothing saying Satoshi can't own a Jupetta himself, two major characters with the same Pokemon is an extreme rarity in the series (and even when it does happen, there's usually a connection between the two characters. Satoshi is Haruka's mentor, and their two Fushigidane have a similar relationship. Haruka and Musashi are sorta rivals, and though taking different evolutionary branches was predictable, they both ended up owning a Kemusso, nontheless. I don't see any connection between Satoshi and Harley).
Now, if you wanna talk about Pokemon types that Satoshi never had before, Psychic's the perfect case. A rather popular type, but the most he has is a Yorunozuku that can use psychic moves. If anything, I say he should've got that Banebuu, especially after he helped the damn thing find its pearl twice. It could've made great friends with Coatoise, too (god knows the poor guy needed some characterization and focus when he was on the team).