Boo Block

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Boo Block
First appearance Super Mario World (1990)
Latest appearance Super Mario World: Super Mario Advance 2 (2001)
Variant of Boo

A Boo Block[1] (originally known as Boo Buddy Block[2], also known as Block Boos[3][4]) is a combination of a Boo and a Block first appearing in Super Mario World. When looked at, it seems to be a normal, gray block. But if Mario takes his eyes off it, it slowly begins to transform into a Boo. They are actually required to clear a certain Ghost House, Choco-Ghost House, as Mario must lure them towards him, turn around, and jump on and leap off them to reach a high ledge, where the exit door awaits. In Super Mario World: Mario to Yoshi no Bōken Land, when the Boos turn into blocks, they still show their face, but in the original game, their faces disappear.

A Pink Boo in block form in Super Mario Sunshine.

Boo Blocks return in Yoshi's Story. They appear solely in Stage 6-3: Ghost Castle. Their Ghost Block[2] form is redesigned with pink and white strips rather than being a solid gray block. In addition, they take a different appearance from normal Boos when Yoshi is looking away.

In Super Mario Sunshine, there are Pink Boos which turn into solid platforms when squirted. These, too, are needed to complete certain levels.

Blocks that look similar to Boo Blocks appear in Mario & Luigi: Bowser's Inside Story in the Energy Hold.

Names in other languages[edit]

Language Name Meaning
Japanese ブロックテレサ[5]
Burokku Teresa
Block Boo


  1. ^ Yoshi's Story official website (Wayback Archive). Retrieved December 20, 2015.
  2. ^ a b Nintendo Mario Mania Player's Guide. Page 51.
  3. ^ Yoshi's Story official website (Wayback Archive). Retrieved April 22, 2015.
  4. ^ "Block Boos: These Boos turn into blocks when you turn to face them. They are too valuable as blocks, so why bother defeating them?"- Nintendo 64 Game Secrets, 1999 Edition Prima Official Strategy Guide. Page 110.
  5. ^ 「ヨッシーストーリー 任天堂公式ガイドブック」 (Yoshi's Story Nintendo Kōshiki Guidebook), pages 114 & 116.