Protobatter

Protobatter is a round, dumpy creature that looks like a Flurry found in the Pump Works. It holds a club and is found inside Bowser's Stomach in Mario & Luigi: Bowser's Inside Story. It grows whenever Mario and Luigi attack it. It also makes shockwaves with its club. Its growth can vary from two times bigger to three times bigger. It attacks by spitting a piece of batter and slamming it with its club at the bros. The directon it holds it's club is to indicate which bro is being attacked. This attack is countered with the hammer.