Gradabug is the chief engineer of CloudRunner Fortress. He is in charge of manning the power generator room. Krystal first meets Gradabug in the dungeon after she was captured and gets her staff back and she releases him. (It is unknown how she retrieved the staff.) There Gradabug gives Krystal the key to the generator room. Gradabug also tells Krystal where to find the Queen CloudRunner when General Scales captured her again. He also tells Krysal that she must return the second Spellstone to the Ocean Force Point Temple.
- Gradabug is one of the only two dinosaurs not belonging to any particular tribe, the other being Shabunga (the ShopKeeper). However, the Nintendo Power Strategy Guide indicates that he is a member of the bonehead tribe.