The red Giant Bowser represents Ifrit, a giant horned character who features a red color scheme.
The stage and music track reference the Ifrit boss battle in Crisis Core: Final Fantasy VII where Zack Fair battles Ifrit in a similar fiery setting.
The stage and Lava Floor hazard reference signature ability, Hellfire, which engulfs the summoner's enemies with fire and inflicts fire damage.
The Attack Power ↑ rule references Ifrit's usage of powerful fire-based attacks.
The Attack Power ↑ and Move Speed ↑ rules reference Ifrit's appearance as a summon in Final Fantasy VII Remake where it can perform quick and powerful attacks on an enemy.
Other trivia:
This spirit's Attack and Fire Attack ↑ ability further reference Ifrit's red color scheme and usage of fire-based attacks.
