Know any "unrippable" games? I'm great at breaking things

[SuperMario123311]

There is Duludubi Star, The format seems common (.skn) but whenever I use specific tools they don't seem to work.

https://www.mediafire.com/?uy1ixn70169bez6

There is also Pac-Man World 3 but I have found some BMS scripts to convert models... They still are fairly broken though.