Castle Grimm on Planet Gremlyn is the final destination for Xenor Krell, a treasure hunter on a quest to retrieve the Ultragem that was stolen from her people. Unfortunately, her mission is impeded by Serpentus, guardian of the gem, who surprises her which causes her to twist her ankle. Luckily for her, Xenor is rescued by the passing Tekno the Canary and Amy Rose, the latter using her crossbow to frighten off Serpentus. Xenor explains her plight, so Amy is only too happy to finish the mission off for her. Taking the map, Amy is faced with a choice between two doors; the first unleashes a flamethrower at her, whilst the second drops her into a pit of water. Although she barely manages to escape to the next room, she is rewarded by the waiting Ultragem. However, removing the gem from its pl