how to work with bundled files in AssetStudioGUI?

[gingerneutral]

ive been trying to rip sprites from Monster Roadtrip, but a lot of the files in the code end in ".bundle". There's a single folder already in the assets folder that has one "category" of images labeled that bundled one but ending in ".bundle_unpacked," and inside that folder are two files with the same title, but only one has a file extention, which is ".resS" and thats the only file i can access with AssetStudioGUI. Can someone help me figure this out? I'm relatively new to sprite ripping but haven't had too much trouble like this until now.

This is a screenshot of a bunch of the bundled things, altho not all of them, just for reference.
   
And this is the entire contents of the ".bundle_unpacked" folder.
   
Please advise. Thank you~