Monty Bros.

The Monty Bros. are a group of four 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, using a giant drilling machine to fulfill Bowser's former orders. Bowser eventually realises that the Monty Moles haven't made so much progress, letting the King Koopa to pull off his objective by taking the machine and punch it 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.