Idaho is a supporting character in The Amazing World of Gumball. He is a little potato from the countryside who follows beliefs and manners similar to the mannerisms of the Amish.
Idaho is an anthropomorphic potato, with a face, arms, and legs, all drawn in black. He is very small, and is quite possibly the tiniest character in the show so far (excluding Virus). In Season 2, his face gets smaller, and he becomes slightly darker.
Idaho, having been born and raised in the countryside, follows beliefs and mannerisms similar to the Amish, and speaks with a Southern twang. He also does not seem to be very bright.