This mecha paper model is Grape Popsicle Guy (Candy Person 16), first seen in the crowd of Candy People during the party in "The Enchiridion!" , based on the American animated television series Adventure Time, the papercraft is created by WebDude. He looks like a light-purple popsicle with a bite taken out of him. His feet are two popsicle sticks.
You can download the papercraft template here: Adventure Time - Grape Popsicle Guy (Candy Person 16) Free Papercraft Download