Monty Bros.

The Monty Bros. are a group of 4 Monty Moles who are Bowser's minions in Mario & Luigi: Bowser's Inside Story. They are first seen trying to tunnel a hole into the center of Toad Town with a giant drilling machine, to fulfill Bowser's former orders. Bowser eventually sees them doing almost no progress, so Bowser agrees to push the machine to its destination.

Later on, in the vault in Bowser's Castle, the Monty Bros. are seen driving the Fawful Express, and claim that Fawful was paying money to stop Bowser from thwarting his plans. The Monty Bros. then jump back into the train and ram Bowser into a rock, more than 100 km away. Here, Bowser becomes giant, and eventually destroys the train, and defeats the Monty Bros.