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Thwimps are tiny versions of the large, stone enemies, Thwomps, that first appeared in Super Mario World. Their name is a portmanteau of "Thwomp" and "wimp", making reference to their diminutive size.
Super Mario series
Super Mario WorldSNES and the Game Boy Advance versions of Super Mario World where they are enemies and hop back and forth in large arcs trying to land on Mario or Luigi. They first appear in Morton's Castle. They usually appear in groups of two and cause obstacles in small hallways. In #3 Lemmy's Castle, the Thwimps created by Magikoopas can be destroyed by shells. However, the Thwimps are only vulnerable for a few seconds, after which the shell will have no effect.
Super Mario Advance 4: Super Mario Bros. 3
Thwimps are also found in the e-Reader level "Swinging Bars of Doom" in Super Mario Advance 4: Super Mario Bros. 3. They can now be defeated by Statue Mario, Invincible Mario, or by Hammer Mario's hammers.
New Super Mario Bros. U
Thwimps reappear in New Super Mario Bros. U. They act the same as they did in Super Mario World and also have the same overall appearance. They can be defeated by hitting a ? Block while the Thwimp is above one. Additionally, blue cracked blocks can be spotted on the place Thwimps stomp. They only appear in Wendy's Shifting Castle.
The Thwimp is one of the very few enemies that do not re-appear in New Super Luigi U.
Mario vs. Donkey Kong
Thwimps also make a few other appearances in later games, such as Mario vs. Donkey Kong where they are enemies that appear in the Spooky House world of the game. The Thwimps try to defeat Mario by landing on him and are invincible, but once again Mario must avoid them to defeat Donkey Kong and win the level.
Names in other languages