Thwomp (ドッスン, Dossun) is an enemy from the Mario series.
Thwomps are recurring Mario enemies, debuting in Super Mario Bros. 3. They hang in the air, and when players passes under them they try to crush them by falling.
One of Kirby's possible Stone transformations is based on a Thwomp, using the blue design from Super Mario 64. A Thwomp also appears as a trophy using its main design which originates from Super Mario Bros. 3.
As in Melee, one of Kirby's possible Stone transformations is the Super Mario 64 Thwomp design.
Thwomp appears yet again as one of Kirby's possible Stone transformations; however, its design is now based on more modern Mario games.
The Thwomp trophy is exclusive to Super Smash Bros. for Nintendo 3DS.
As an Assist Trophy
Thwomp makes its debut as an Assist Trophy. It behaves exactly as it does in Mario platformer games: it hangs in the air, and falls down when characters pass under it. Training Mode describes the Assist Trophy: Squishes opponents caught beneath it. Can't be KO'd.
As in SSB4, the modern Thwomp design appears as one of Kirby's possible Stone transformations.