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Sonic & Knuckles
Mushroom Hill Zone

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Fantastic mushrooms cover the lush hills deep in Floating Island's interior. Many useful kinds of plants grow here. See how they can help you.

— United States instruction booklet, Sonic & Knuckles[1]

Mushroom Hill Zone (マッシュルームヒル ゾーン[2] Masshurūmuhiru Zōn?) is the first Zone of Sonic & Knuckles (and the seventh of Sonic the Hedgehog 3 & Knuckles). It is a lush forest notable, as its name would suggest, for its giant mushrooms that can be used as various springs and platforms.


Act 2 takes place on a desperate run through the forest. Here, a weather machine is rapidly progresses the seasons from spring, through summer and autumn, and into winter. Through different sections, the color of the forest will change from green to red to tan.


Sonic's story

Knuckles' story


Mushroom Hill Zone contains lots of Giant Rings compared to other Zones in Sonic & Knuckles, making it important to collect as many Chaos Emeralds as possible before leaving this zone if aiming to collect all seven before completing the game.


Act 1

Sonic in Mushroom Hill Zone.

In the first Act, when playing as Sonic, Tails will airlift Sonic down from their free-fall after stopping the Death Egg's launch in the previous Zone. Sonic then spies Knuckles closing the door to a passageway leading to a Warp Ring for the Special Stage. In the complete game, Knuckles is hiding a glowing Giant Ring that takes the user to the island's Hidden Palace. Here, all collected Chaos Emeralds' powers are taken by the Master Emerald and they are transformed into dormant Super Emeralds. From this point on, Giant Rings (distinguishable by the colors of the Emeralds which it flashes) transport the player to the Hidden Palace Zone for another chance at a Super Emerald.

When playing as Knuckles, the game proceeds often with secondary paths not available to Sonic and Tails.

Act 2

At the end, the player must destroy the local weather machine (in the form of a satellite dish in the ground) to turn the forest back to normal and trigger the boss fight, as Robotnik will rise from where he was concealed and attempt to make a run for it with his plan ruined and himself exposed.


Hei Hou

Main article: Hei Hou

The mini-boss of this stage, Hei Hou, wields an axe and chops sections of tree trunks to throw at the player. It is a large forest filled with hills and giant mushrooms.

Jet Mobile

Main article: Jet Mobile

Dr. Robotnik will appear after the weather-changing satellite is destroyed, rising up from his hiding spot underneath where the satellite was. Upon this, he will fly backward past trees that hold spikes at varying heights from one end to another while running after the mad scientist. Occasionally, Dr. Robotnik will activate the jets in the front of his machine, either one, the other, or both simultaneously. After enough hits, he'll crash into a large tree with a small tunnel at the bottom which Sonic, Tails, or Knuckles can run through to reach the animal capsule.

Other game appearances

Sonic the Fighters

Mushroom Hill in Sonic the Fighters.

In Sonic the Fighters, Mushroom Hill Zone appears as an area set up on a giant tree stump surrounded by giant mushrooms. In story mode this is the stage in which Espio is fought.

Sonic Jam (

In Sonic Jam (, Mushroom Hill Zone is where Sonic & Knuckles takes place in.

Sonic Generations

Classic Sonic in Mushroom Hill

In the Nintendo 3DS version of Sonic Generations, a past version of Mushroom Hill got transported to White Space as a side-effect of the Time Eater's time-traveling, where it was drained of color and life.

Mushroom Hill was the third area Modern Sonic and Classic Sonic paid a visit to after ending up in White Space. By speeding through Mushroom Hill, the Sonics were able to fix space, thereby restoring the Zone from its lifeless state. When the Time Eater later got destroyed, Mushroom Hill was seemingly returned to its rightful place in the timeline.

Sonic Dash

In Sonic Dash, Mushroom Hill Zone appears as one of the playable tracks in the game.

In other media

Archie Comics

Relic and Fixit at the Mushroom Hill Zone, from Sonic Universe #65.

In the Sonic the Hedgehog comic series, Mushroom Hill Zone (called Mushroom Hills) was originally a Zone on Angel Island. It was first visited by Sonic and Tails, who battled the Hei Hou there.

When the Super Genesis Wave re-wrote history, Mushroom Hill Zone became a permanent Zone located on Angel Island. The alien Eclipse the Darkling eventually crashed here after the New Black Comet was destroyed.

Sonic the Comic

The Mushroom Hill Zone, from Sonic the Comic #59. Art by Nigel Kitching.

In the Sonic the Comic comic series and its spin-offs published by Fleetway Editions, Mushroom Hill Zone appears as a Zone on the Floating Island. The entire population of the Emerald Hill Zone was temporarily relocated to the Mushroom Hill Zone in order to protect them from Dr. Ivo Robotnik's tyranny. There, they made themelves homes out of the Zone's giant mushrooms. After Robotnik's dictatorship over Mobius was toppled, the Emerald Hill Folk would leave Mushroom Hill Zone for their home.

Sonic Boom

In the Sonic Boom series, Mushroom Hill is a location earth.

IDW Publishing

Mushroom Hill Zone, from Sonic the Hedgehog 30th Anniversary Special.

In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, Mushroom Hill Zone is a location on Angel Island in an alternate dimension set in the recent past. Once upon a time, Knuckles was attacked there by Metal Knuckles. Although he managed to hold the robot off, it managed to escape with a Chaos Emerald after putting the local animals in danger.


  • In the Sonic the Hedgehog 3 Sound Test (Level Select) screen, there is an unused level slot called Mushroom Valley. This may have been the original title for this level.
    • In addition, trying to play the Zone in the standalone Sonic the Hedgehog 3 (without Sonic & Knuckles) will result in a title card for the Zone with the name missing, and then the game crashes with garbled graphics. The theme for the level will still play, though.
  • The satellite whose destruction restores the state of Mushroom Hill is likely the same environment-changing device mentioned in the Japanese manual of Sonic the Hedgehog 3.
  • In Sonic & Knuckles standalone, there are exactly nine Giant Rings in both Acts of Mushroom Hill Zone (two of them can only be accessed with Knuckles, though), making it possible to get all the Chaos Emeralds before fighting the boss. In Sonic the Hedgehog 3 & Knuckles, there are eleven Giant Rings, due to two added areas at the beginning of the level, one for Sonic and/or Tails and two for Knuckles (if he back tracks on Sonic's route).
    • If the save data is carried over from Sonic the Hedgehog 3, there is a glitch in which some of these Giant Rings will not appear.
  • In Sonic Heroes, Mushroom Hill is mentioned by Knuckles during Frog Forest.
  • The music for Act 1 was remixed as the music for Aquatic Relix Zone Act 1 in Sonic the Hedgehog Pocket Adventure.





Name Artist(s) Length Music Track
N/A (Mushroom Hill Zone Act 1) 1:50
N/A (Mushroom Hill Zone Act 2) 1:44


  1. Sonic & Knuckles (Sega Mega Drive) United States instruction booklet, pg. 12.
  2. Sonic & Knuckles (Sega Mega Drive) Japanese instruction booklet, pg. 33.

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