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A Ka-thunk from Super Mario 3D World.
Artwork from Super Mario 3D World
First appearance Super Mario 3D World (2013)
Latest appearance Super Mario 3D World + Bowser's Fury (2021)

Ka-thunks[1] are obstacles in Super Mario 3D World and Super Mario 3D World + Bowser's Fury. They are encountered in King Ka-thunk's Castle and Bowser's Lava Lake Keep only. Ka-thunks resemble metal blue square frames covered in spikes that hurt the player upon contact. They either spawn in small crevices and move along a set path until they fall into an abyss, or appear moving in a looping path. Some simply flip from side to side. They function similarly to Tox Boxes, as they move along paths, and the player must avoid them by using the hollow space in the middle. They cannot be destroyed by any means, including invincibility, excluding a pair of Ka-thunks in Bowser's Lava Lake Keep that disappear upon defeating a pair of Hammer Bros.

King Ka-thunk holds on to a larger Ka-thunk during his battle.


Additional names[edit]

Internal names[edit]

Game File Name Meaning

Super Mario 3D World content/ObjectData/Wackun6x6M.szs Wackun6x6M Romanization of「ワックン」(Wakkun); play on「枠」(waku, frame) and possibly a reference to「ドッスン」(Dossun, Thwomp)

Names in other languages[edit]

Language Name Meaning
Japanese ガッチン[2]
Pun on「ガチン」(gachin, onomatopoeia for slamming noise) and possibly a reference to「ドッスン」(Dossun, "Thwomp")

Dutch Kathunk
French Klonk
Pun on the English onomatopoeia "clonk"
German Klonk
Same as French name
Italian Clompo
Masculine form of "clomp" (the sound of a crushing object)
Portuguese Quadrapumba
Portmanteau of quadrado ("square") and pumba (onomatopoeia for slamming noise)
Spanish Marcoplás
Portmanteau of marco ("frame") and plás (sound of a crushing object)


  1. ^ Musa, Alexander, and Geson Hatchett (November 22, 2013). Super Mario 3D World PRIMA Official Game Guide. Prima Games (American English). ISBN 978-0-804-16249-4. Page 27.
  2. ^ Sakai, Kazuya (Ambit) et al. (October 19, 2015). Super Mario Bros. Hyakka: Nintendo Kōshiki Guidebook, Super Mario 3D World section. Shogakukan (Japanese). ISBN 978-4-09-106569-8. Page 225.