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Some type of compression for this game? (JoJo's Bizarre Adventure for the PS1) - Printable Version

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Some type of compression for this game? (JoJo's Bizarre Adventure for the PS1) - eureka - 07-15-2016

So, This is something I've been wanting to do for a while now.
Basically, this is a port of the arcade game of the same name (it's pretty cool if you're into fighting games, I recommend it), and I was wanting to rip some sprites of it.
...The thing is, it seems to have some custom(?) compression on most of the sprites, and I don't exactly want to rip every sprite from VRAM.
Basically, anyone think they can figure this out?  Or if someone already has (which I doubt), can point me in the right direction.
Sample: https://www.mediafire.com/?lk0h7dbby535vud