Scarlet Wollywog (recolor)

The Scarlet Wollywog is, like many red-colored frogs that humans know, poisonous. However, you would not know it unless you read it in a guide; it is only poisonous to those that eat it. Since pikmin don't eat the Wollywog and onions are not affected by toxins in what they process, the poison in the Scarlet Wollywog does not affect game play in the slightest. For all the players care, it is just a recolor of a Yellow Wollywog.

Pikmin: The Huge Debt
They do in fact have a deadly poison on there back. when you throw Non White Pikmin on their back then they will run around with a poisoned stem until you blow the whistle on them.