A mod for Perfect Dark replaces all of the characters with ones from the Mario universe along with a variety of changes & improvements. For example multiple guards are now female with new outfits for different levels along with the unused Hat mechanic now being utilized with new hat models that guards can wear. While the level layouts & objectives are the same as the original game, some have gotten some noteworthy changes that will throw off experts.
A mod for GoldenEye that replaces all of the characters with ones from the Mario universe along with edited dialog to make more sense with the characters, however the story itself is mainly the same as the original. Some minor changes have been made to the levels to work better with the characters, as well as incorporate scrapped and/or new content.