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A Spiny Tromp is a large, spiked orb with a surly face; it resembles a circular Thwomp. Its name is likely derived from "trample", referring to their attacks, and "Thwomp". Though they are not named in their first appearance, Paper Mario, they are later named in Super Paper Mario. "Tromp" itself is also a slang word that can mean either "trample" or "ultimately destroy".
Spiny Tromps first appear in Paper Mario, where they are found inside Mt. Lavalava. In a corridor of Mt. Lavalava, a Spiny Tromp appears to try to crush Mario, which can only be avoided by using Bow's intangibility powers to avoid the Spiny Tromp.
Later, another Spiny Tromp, after having its path cleared by Mario and his Ultra Hammer, rolls haphazardly towards Mario. Mario once more needs to use Lady Bow's ability to make himself intangible to avoid the rolling Spiny Tromp. The Spiny Tromp continues to roll and crush the nearby Kolorado before breaking through a nearby wall and embedding itself in another wall, clearing Mario's path.
Super Paper Mario
Despite their absence from Paper Mario: The Thousand-Year Door, several Spiny Tromps appear in Super Paper Mario as obstacles in the Mount Lineland and Underwhere Road, where they are shown to come in varying sizes. To dodge these Spiny Tromps, Mario needs to jump over them or Flip, which reveals that Spiny Tromps are actually rather thin and composed of three layers of a spiked, cardboard-like substance, so they can still harm Mario while in 3D.
Names in other languages