Mini Chomp

Mini Wanwan are small Chomps that appear in Super Mario Galaxy and Super Mario Galaxy 2. They act exactly like Chomps but are smaller and have high-pitched barks. Some Mini Wanwan (such as the ones in Chompworks Galaxy) can go in a circular line, something that normal Chomps cannot do.

However, regardless of their size, they can only be defeated by being hit by Rainbow Mario, getting hit by a rubbery bulb, or being held by the co-op player's Star Cursor so that they hit each other. They release Star Bits when defeated.

In Super Mario Galaxy, they are only found in the Infiltrating the Dreadnought mission of Dreadnought Galaxy, where they roll out of doghouses down a slope covered in two sets of Flipswitch Panels. When one set of the panels is completed, all the Mini Wanwan in that segment are immediately destroyed and stop respawning.

In Super Mario Galaxy 2, they are found early in the game in the Sky Station Galaxy, specifically Storming the Sky Fleet, where they roll in circles on the starting planet. Later in the Chompworks Galaxy, they appear both rolling in circles and released from the same manner of holes as their larger counterparts, going in a straight line until they destruct against a hyperactive Gearmo.

Trivia

 * The sound that Mini Wanwan make when they bark is similar to the sounds that Chain Chomplets make.