To defeat the Sailor Senshi and destroy Yoshiki Usui's Dream Mirror
Fisheye was about to kill fashion designer Yoshiki Usui after he didn't find Pegasus in his dreams, when Sailor Moon and Sailor Chibi Moon came to stop him, so he summoned Gum Mario to fight them. A sea lion was initially bouncing him on his head, but as he attacked Sailor Moon and Sailor Chibi Moon, it bit Fisheye as he left through a portal, taking it with him. Gum Mario gained the advantage against the two Sailor Senshi before Tuxedo Mask attacked and deflated him. As he attacked again, Sailor Chibi Moon summoned Pegasus with Twinkle Yell, and Sailor Moon destroyed Gum Mario with Moon Gorgeous Meditation.
He attacks mainly by bouncing around at high speed.
- Gum Mario is not only the cousin of Puko, but also the brother-in-law of Hawk's Eye's Lemures, Elephanko.