Its based on a manga, of course mangas are just wacky.
I would stay away from games based on mangas or anime ...
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Generally the games suck but there are some gold Nuggets in there, DBZ Bukdokai did some stuff that's fairly new. That's the only one I can come up with, but several Japanese games have anime styled cutscenes in them (LUNAR!). I wanna see a Battle Angel Alita anime.