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Undergrunts are large moles that appear in Super Mario Galaxy and Super Mario Galaxy 2. They seem to be militaristic Montys: Undergrunt refers to a low rank, while Major Burrows and Undergrunt Gunners also use military terms in their names.
Super Mario Galaxy
In Super Mario Galaxy, Undergrunts appear in Gusty Garden Galaxy in the mission The Dirty Tricks of Major Burrows as uncommon enemies on two planets. Even though the Undergrunts' helmets lack spikes on the top (though they do have spikes on the sides), Mario and Luigi are not able to safely jump on them. However, Undergrunts can be defeated by Ground Pounding near them, then spinning them after they have popped out. They give a Coin when defeated. Undergrunts also appear in Gold Leaf Galaxy.
At the end of Gusty Garden Galaxy, there is the boss of this galaxy, Major Burrows, who is the leader of the Undergrunts and can be defeated in almost the same way.
Super Mario Galaxy 2
Only two Undergrunts appear in Super Mario Galaxy 2 on the Undergrunt Planet in Battle Belt Galaxy. They are defeated the same way as in the previous game. However, they give three Star Bits instead of a Coin when defeated.
In addition, Major Burrows reappears in Boss Blitz Galaxy.
An Undergrunt's appearance is similar to most mole-like characters (Monty Moles, Rocky Wrenches, etc.). They have dark brown fur, and light brown bellies, noses, and cheeks. Undergrunts also have yellow spiked helmets preventing the player from stomping or spinning the mole. This is the only indication of an Undergrunt beside the fact that they leave a dirt trail behind when they tunnel in the ground.
Names in other languages