Thwomp (Mario & Luigi: Superstar Saga)
From the Super Mario Wiki
“I am Thwomp, and I love a good game! Test your luck for a mere 200 coins! Are you guys ready to show me the mightiest swing you've got?”
Thwomp is a character that lives in the new home of the Hammerhead Bros. in Mario & Luigi: Superstar Saga. After the Hammerhead Bros. move from Hoohoo Mountain to the Beanbean Kingdom outskirts, the Gray Rocks and Black Rocks inside their house can be destroyed as they upgrade Mario and Luigi's hammers, revealing Thwomp in a featureless room. He explains that he wants to play a game, charging Mario and Luigi 200 coins to destroy one of three stones that he summons down. The stones have a chance of containing 200 coins, 300 coins, Secret Scroll 1 (which teaches Swing Bros.)/Secret Scroll 2 (which teaches Cyclone Bros.), or nothing.
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