Does anyone know this format?

[Ploaj]

I know they are the animations because, well, they are the only things besides scripts and sounds in the iso. The music are all oggs and sounds are wavs.
I just thought it was strange that the sound files (which normally have their own format for wii) were in mainstream formats but the images were not. There are even true font files (which I've installed into my computer hehe).

I guess this games sprites are unrippable for now. Oh Well.