King Ka-thunk

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King Ka-thunk
King Ka-thunk
First appearance Super Mario 3D World (2013)
Latest appearance Super Mario 3D World + Bowser's Fury (2021)
King Ka-thunk, as seen in-game.
Fighting King Ka-thunk.

King Ka-thunk[1] (known as King Kathunk in the British English version of the original game) is a boss that appears in Super Mario 3D World and its Nintendo Switch port Super Mario 3D World + Bowser's Fury as the boss of World 5-Castle: King Ka-thunk's Castle. He is a small, blue metal square with red shoes and detached red hands. He also has five spikes on the front (one of which is positioned like a beak right below his eyes) and his back is pink and fleshy with a bandage on it. King Ka-thunk floats in the middle of another, larger Ka-thunk frame.

He serves as the boss of World 5. His main attack is moving around the Ka-thunk frame before finally stopping in one of the corners. After this, the ground that King Ka-thunk will fall on glows red before he crashes into the ground, damaging any players caught under him or his frame. To damage King Ka-thunk, the player has to jump on his backside while he is facing down. Oddly enough, he is not damaged if a player is thrown onto his weak spot by another player. After each hit, two of the arena's corners will fall off, and King Ka-thunk will become faster and more erratic. Once three hits are landed, King Ka-thunk is defeated, several circles of Coins appear, and the Warp Box to the Goal Pole is revealed.

King Ka-thunk later reappears as one of the bosses in World Flower-12: Boss Blitz with the exact same strategy from his first battle in World 5.

Names in other languages[edit]

Language Name Meaning
Japanese Boss Wackun[2]
Gacchin Kingu
From Ka-thunk's internal name, "Wackun"

Ka-thunk King
Chinese (Simplified) 框当王
Kuāng Dāng Wáng
Pun on「框」(kuāng, frame) and「哐当」(kuāngdāng, the sound of crushing objects) +「王」(wáng, king)
French Roi Klonk King Ka-thunk
German König Klonk King Ka-thunk
Italian Re Clompo King Ka-thunk
Portuguese Rei Quadrapumba "Rei" (king) + portmanteau of "quadrado" (square) and "pumba" (onomatopoeia for thumping)
Russian Кар-Кас
Pun on "каркас" (karkas, frame) and possibly "кар" (kar, the sound of a crow)
Spanish Rey Marcoplás King Ka-thunk


  1. ^ Level name: King Ka-thunk's Castle
  2. ^ Super Mario 3D World internal filename (BossWackun)