Here you can find a number of tools:
http://altmer.arts-union.ru/3DO/3do_utils.htm
unCD-ROM v1.2 will allow you to extract 3DO roms,
RIPto2048 will allow you to convert roms, unextractable with unCD-ROM by defaut, to extractable format
3DOResExplorer will allow you to view images and convert them to .bmp format, though isn't finished and will probably never be. Fortunately the source code is available to download so it may give some info about the 3DO file formats.
Also here is a Noesis plugin that I made:
3DO_CCD_texture_dumper
It allows you to rip .cel images, viewable by 3DOResExplorer, from various archives similar to how Gitmo works. Just open the plugin in a text editor like notepad and replace ".pak" in the line
handle = noesis.register("Dump 3DO CCD images", ".pak") with the format you want to rip sprites from and open the file in noesis. It is not finished and will probably be updated later. Also for some reason it won't work correctly unless you reload plugins after every extraction and unfortunately I don't know what's causing it.
Game specific info:
The images are viewable using 3DOResExplorer by default. Some images seem to be incorrect.
Character sprites and stages are in custom format, but some sprites are .cel and rippable with 3DO_CCD_texture_dumper. Examples:
You can get the sprites with my 3DO_CCD_texture_dumper plugin. I've already submitted a few to the spriters-resource.
A pair of images is .cel, but the rest are kept in archives of unknown format.
You can rip the sprites from .ANIM archives with my 3DO_CCD_texture_dumper plugin. I've already submitted a few to the spriters-resource.