Her guardian hero, MagMan, had defended her home and her people from the evil mantle-dwellers until his herothalamus stopped producing bravezymes, causing him to lose his heroism. Her guards capture Randy Cunningham and hold him hostage, intent on transferring his hero essence to MagMan in order to revive him.
Not long after, Howard Weinerman shows up with fellow classmates of Norrisville High. After fighting off Queen Gabnidine and her guards, Randy throws a Tengu Fireball at a tank of methane gas. The explosion ends up incinerating the queen and destroys her underground lair.
- Despite being a female, Gabnidine is voiced by a male actor.
- Queen Gabnidine is the second female villain. The first was The Sorceress.