The Pyrosphere is based on the Geothermal Power Plant room in Other M where Samus Aran fought Ridley. In Wii U, the area features mainly the same appearance, retaining the bridge that Ridley burns down, the magma-eruption port that Samus destroys to light the area, and the hole in the wall created by Ridley's escape. The hole has been moved slightly to the right and there is another hole to the right of the door for unknown reasons. Four floating platforms and two purple canisters on either side of the main platform have been added to the stage that were not present in Other M and the stage has been slightly upped in detail due to the Wii U's greater graphical capacity. In his Miiverse post, Masahiro Sakurai stated "An enemy from Samus's past may appear at any second..." foreshadowing Ridley's role in the game as a stage hazard. In the April 2014 Nintendo Direct, Ridley's shadow could be seen on the stage.
The 50 Must See Things video in October 2014 confirmed Ridley's role, as well as the appearance of FG II-Graham robots, Joulions and Zero. Ridley acts as an AI fighter that will fight alongside a character that attacks him enough. He can be KO'd and he counts towards the KOs at the end of the match. In addition, Ridley can transform into a more powerful form referred to as 'Meta-Ridley', although unlike in the Prime Series he will not gain any cybernetic enhancements and instead glows with a purple aura.
A title update on January 29, 2015 enabled Pyrosphere to be usable in the game's 8-Player Smash mode.
A number of songs that were featured on Frigate Orpheon in Super Smash Bros. Brawl have been moved to Pyrosphere, since the Orpheon stage does not return in Wii U. An asterisk (*) denotes those songs.
- Vs. Ridley*
- Vs. Parasite Queen*
- Title (Metroid)
- Sector 1*
- Vs. Meta Ridley*
- Multiplayer (Metroid Prime 2: Echoes)*
- Nemesis Ridley
- Psycho Bits
- Lockdown Battle Theme
- Super Smash Bros. for Wii U is the second fighting game to feature the Pyrosphere as a stage, after Dead or Alive: Dimensions. In that iteration, it lacked the floating platforms and featured Samus and Ridley as stage hazards.
- Pyrosphere, Boxing Ring (Punch-Out!!) and Green Hill Zone (Sonic) share the distinction of being stages in the Wii U game and in other fighting games.
|Metroid Multiplayer Levels|
|Metroid Prime 2: Echoes||Crossfire Chaos • Sidehopper Station • Shooting Gallery • Spider Complex • Pipeline • Spires • Arena 5|
|Metroid Prime Hunters: First Hunt||Ancient Vestige • Assault Cradle • Trooper Module|
|Metroid Prime Hunters|| Combat Hall • Data Shrine • Processor Core • High Ground • Ice Hive • Alinos Perch • Sic Transit • Transfer Lock • Sanctorus • Compression Chamber • Incubation Vault • Subterranean |
Outer Reach • Harvester • Weapons Complex • Council Chamber • Elder Passage • Fuel Stack • Fault Line • Stasis Bunker • Head Shot • Celestial Gateway • Alinos Gateway
VDO Gateway • Arcterra Gateway • Oubliette
|Metroid Prime Pinball||Magmoor Caverns|
|Super Smash Bros.||Planet Zebes • Planet Zebes: Brinstar • Planet Zebes: Brinstar Depths • Norfair • Frigate Orpheon • Pyrosphere|
|Dead or Alive: Dimensions||Geothermal Power Plant|