Sonic News Network

Know something we don't about Sonic? Don't hesitate in signing up today! It's fast, free, and easy, and you will get a wealth of new abilities, and it also hides your IP address from public view. We are in need of content, and everyone has something to contribute!

If you have an account, please log in.


Sonic News Network
Sonic News Network

The Buyoon[1] (ブヨン[2] Buyon?), also known as Buyon,[3] is an enemy that appears in Sonic Adventure. It is a mass-produced robot created by Dr. Eggman.


Buyoons are flat, capsule-like Badniks with dark blue and gray armor and hazard stripes across their midsection. They also have two rabbit-like ears, two gray eyes and short legs. Inside their body is a gelatine-like liquid that can grow into a large belly-like blob, with the Buyoons' upper and lower body remaining attached to it. When this happens, the Buyoons' framework are visible inside their belly.


A inflated Buyoon next to Sonic in Sonic Adventure DX: Director's Cut.

Buyoons are found in either Sonic or Amy's edition of Twinkle Park. On their own, the Buyoons hop around idly in their regular uninflated state. When the player approaches, however, their bellies expand to maximum size and they start walking towards the player at low speed.

While the Buyoons are inflated, they can bounce any attack on their bellies backwards. While the Buyoons will deflate for a limited time to recharge, they will eventually re-inflate and continue their chase. To defeat a Buyoon, the player must attack its head using the Homing Attack or Jump Attack.


  • Buyoon's name originates from the Japanese onomatopoeia buyo buyo (ブヨブヨ?), which is used to denote something soft or squishy.


  1. Bryan Stratton (17 June 2003). "Sonic the Hedgehog's Action Stages". Sonic Adventure DX: Director's Cut: Prima's Official Strategy Guide. Prima Games. p. 28. ISBN 978-0761542865.
  2. "敵キャラクター紹介" (in Japanese). ソニックアドベンチャー オペレーションガイド. SoftBank. January 1999. p. 150. ISBN 978-4757203006.
  3. Flynn, Ian; Sega (8 December 2021). Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 102. ISBN 978-1506719276. "Buyon - A giant gelatinous blob that's only vulnerable on its rabbit-like head."

Main article | Scripts (Sonic, Tails, Knuckles, Amy, Big, Gamma, Super Sonic) | Story Screens (Sonic, Tails, Knuckles, Amy, Big, Gamma) | Credits | Glitches | Beta elements | Gallery | Re-releases (DX, 2010)