This mecha paper model is Gingerbread Muto (Candy Person 45), a gingerbread man resembling Adam Muto, based on the American animated television series Adventure Time, the papercraft is created by WebDude.
He appears in "Slumber Party Panic" and "The Enchiridion!" in crowds. He also appears scared in the opening scene of "No One Can Hear You." He makes an ongoing appearance in the opening sequence on top of the castle; the one time he doesn't make this appearance is in "Fionna and Cake" in which Gingerbread Rebecca takes his place. According to Adam Muto, Gingerbread Muto is "crafty."
He is one of the Gingerbread with the same names as Adventure Time staff members. The others are Gingerbread Pen, Gingerbread Rebecca, and Gingerbread Pat. Adam Muto and Pendleton Ward confirmed that it was a younger, vibrant version of himself.
Gingerbread Muto has two red buttons and one blue button on his chest. He also has white lines all over his body presumably marking a shirt, collar, pants, and shoes. He has short, straight dark brown hair that has bangs and goes to the side. [Source: wikia]
You can download the papercraft template here: Adventure Time - Gingerbread Muto (Candy Person 45) Free Papercraft Download