Sergeant Guy

Sergeant Guy is a Green Shy Guy that carries a silver pipe and a Magikoopa's wand on his back. He is a minion of Bowser in Mario & Luigi: Bowser's Inside Story. He is first seen with Corporal Paraplonk and Private Goomp attempting to take Bowser's Castle back from Fawful with a Banzai Bill Blaster. However, the minions have no ammo and Bowser is forced to go inside and get some ammo. Once Bowser obtains the Banzai Bill, the three minions fire it into the castle.

Later on, near the vault in the Tower of Yikk, Sergeant Guy and his companions watch Bowser defeat the Fawful Express and once Bowser opens the safe, Sergeant Guy and the other minions push Bowser into the safe, stating that Fawful was going to pay good money for Bowser's head.

The latest appearance of Sergeant Guy was after the closing credits, where him and the other minions apologize for their treason and asks Bowser if they could rejoin the Koopa Troop. Bowser forgives them on one condition: they have to help with castle repairs.