Boo Guy

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Boo Guy
SMW2 Yoshis Island Boo Guy.png
First appearance Super Mario World 2: Yoshi's Island (1995)
Latest appearance Poochy & Yoshi's Woolly World (2017)
Parent species Shy Guy
Derived species
Ghoul Guy
Relay Heihō
Related species
Ghost Guy

A Boo Guy[1] is a ghostly-looking Shy Guy. Boo Guys first appeared in Super Mario World 2: Yoshi's Island. Boo Guys are white and have a wispy tail similar to other Boos. As such, Boo Guys hover rather than walk. As with Shy Guys, Boo Guys wear masks, move slowly, and can be stomped or swallowed by a Yoshi, providing Yoshi Eggs. They can also spawn from Warp Pipes, similarly to Shy Guys.


Yoshi series[edit]

Super Mario World 2: Yoshi's Island / Yoshi's Island: Super Mario Advance 3[edit]

Boo guys.PNG

Boo Guys first appear in Super Mario World 2: Yoshi's Island, first occurring in Bigger Boo's Fort, either wandering or spawning from Warp Pipes. They can follow the Yoshi for short distances. If the Yoshi collides with one, it drops Baby Mario. To defeat them, the Yoshi can stomp on it or swallow it for eggs. If the Boo Guy is spat out, it can roll through several enemies, defeating them.

Shy Guy mace.png

In the background of some levels, Boo Guys are seen using harmful traps, including Tekkyū Dosun. If the Boo Guy sees a Yoshi, it drops the mace. Once the mace hits the ground, the Boo Guy then takes time to lift it to perform its attack again. Also, groups of Boo Guys operate a long, revolving spiked mace, rotating at a constant speed.

In some castles, Boo Guys are stationed in long rows in the ceilings and drop bombs. These ones are known as Relay Heihō.

Yoshi's Island DS[edit]

Boo Guys reappear in Yoshi's Island DS. Boo Guys remain unchanged, although they are not seen operating machinery nor are they seen relaying bombs.

Yoshi's New Island[edit]

Boo Guys return in Yoshi's New Island.

Yoshi's Woolly World / Poochy & Yoshi's Woolly World[edit]

Both forms of Boo Guys in Spooky Scraps! Don't Get Spooked!.

Boo Guys return in Yoshi's Woolly World and Poochy & Yoshi's Woolly World and can be eaten by Yoshi, forming a white Yarn Ball. In the level Spooky Scraps! Don't Get Spooked!, Boo Guys turn into an evil shadow when behind the hanging paper, which means they can chase Yoshi and cannot be eaten.

Mario & Luigi: Partners in Time[edit]

Partners in Time Enemy
Boo Guy
PiT Boo Guy.gif
Location(s) Toadwood Forest
HP 19 (24)
POW 30 (28)
Defense 30 (24)
Speed 27 (28)
Experience 8 (10)
Level 5
Coins 5
Item Drop Mushroom – 10%
Super Mushroom – 20%
Battled by Anyone
  • Stats in parentheses are from the Japanese and European versions (if they differ from the original American release).

Boo Guys appear in Mario & Luigi: Partners in Time. They are found in Toadwood Forest. They attack by rolling into Mario or Luigi. Before they attack, however, they split into two transparent copies: one real, one fake. Only the real Boo Guy can harm Mario or Luigi. The Boo Guy points to the Mario brother prior to attacking. Ghoul Guys, stronger and faster versions of the Boo Guys, appear in Shroob Castle.

Names in other languages[edit]

Language Name Meaning
Japanese ゆーれいヘイホー[2][3][4]
Yūrei Heihō
Yūrei Shy Guy

Same as Greaper (Mario & Luigi: Partners in Time)
Spanish Fanto Guy
Boo Guy
From fantasma (ghost) and Shy Guy
Boo Guy (Mario & Luigi: Partners in Time)
French Boo Maskass Boo Shy Guy
German Buu-Guy Boo Guy
Italian Tipo Boo Guy Boo


  • The Super Mario World 2: Yoshi's Island Player's Guide describes these enemies as "basically Boo babies"[1], whereas some Japanese guides instead call them Shy Guy ghosts[6][7].


  1. ^ a b Super Mario World 2: Yoshi's Island Nintendo Player's Guide. Page 126.
  2. ^ 「スーパーマリオヨッシーアイランド任天堂公式ガイドブック」 (Super Mario: Yossy Island Nintendo Kōshiki Guidebook), page 5.
  3. ^ 「スーパーマリオアドバンス3任天堂公式ガイドブック」 (Super Mario Advance 3 Nintendo Kōshiki Guidebook), page 23.
  4. ^ Omoide Theater, Yoshi Wool World
  5. ^ The Mushroom Kingdom (Accessed on 2-14-09)
  6. ^ Yoshi's Island DS Nintendo Dream Book, page 17.
  7. ^ 「ヨッシー New アイランド 任天堂公式ガイドブック」 (Yoshi's New Island Nintendo Kōshiki Guidebook), page 26.