Marshmallow Hamster is an S-grade pet released together with Cocoa Cookie. When his ability triggers, he will act like a Magnet Jelly absorbing all jellies ahead of him, except for Dark Moon Jellies in the City of Wizards. His cheeks eventually grow larger until, when he's nice and full, he will burp out an Energy potion (along with a bunch of Cocoa Marshmallow Jellies) you can collect for extra Energy and points.
Its eyes are painted with super concentrated drops of cocoa and its bright red nose with a dash of cherry syrup. He looked to be thin and looked like deflated marshmallow when he was bullied by his friends, but ever since he met the Cocoa Cookie, he's been happier than ever and now he can melt anyone's heart when he smiles with his plum cheeks stuffed with sunflower seeds.