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Hitmontop is cool but it's one of those pokemon that has a gimmick... but doesn't.
What I mean is that Hitmontop has a unique fighting style, it's like breakdancing as a martial art, and this works pretty well to distinguish it in the anime and probably the manga, or any other visual medium. In the games though, the only way they translate this is two underpowered signature moves, both of which are shared with other pokemon by now.
It's sorta like Hypno. Hypno's "gimmick" is that it hypnotizes things, that's what it does best. In the games, hypnosis has wide distribution and Hypno does not have any unique interaction with the move. Its abilities include sleep immunity, flinch immunity, and the ability to read the opponent's moveset. I think a lot of pokemon could really easily be made more distinct if they just leaned harder into their schtick.