Announced at E3 2001, Corneria (惑星コーネリア, Planet Corneria) is a starter stage in Super Smash Bros. Melee, and is essentially a smaller version of Fox's old stage, Sector Z, which was in Super Smash Bros. Corneria later appeared in Super Smash Bros. Brawl as a Melee stage and in Super Smash Bros. for Nintendo 3DS as a familiar stage. In All-Star Mode in Melee, this stage is where one fights Fox and any of his teammates. This stage returns once again in Super Smash Bros. Ultimate, although updated to resemble the stage's appearance in Star Fox Zero. In Smash 3DS and Ultimate, Falco is fought here when being unlocked.
The stage is set on the Great Fox, like every other Star Fox stage released in SSB and Melee. The horizontal blast lines are very close to the main platform, and the stage has a very low ceiling in Brawl. Arwings and Wolfens fly down to fire lasers at players, usually coming from the right hand side or from up above. The lasers can damage players, but they will only make characters flinch very slightly and do no knockback, except in Smash 3DS where the shots explode on contact and can easily KO an unfortunate fighter. They may come in and lock on from the background, flying past the Great Fox. They also serve as moving platforms when they come, though they can carry characters past blast lines. The lasers fired by Arwings and Wolfens can be reflected or absorbed by Mr. Game & Watch, Ness, Lucas, and Mii Gunner. The Great Fox also has two laser cannons in the front. Players can stand on these laser cannons, but they will charge and fire on occasion. Characters caught in the crossfire usually have no chance of survival. However, just like the Arwings and Wolfens, one can use energy-projectile absorption moves like PSI Magnet and Oil Panic to benefit from these shots. In all Smash games so far, the laser cannons can be destroyed, which also stopped them from being used as platforms.
The level is also apparently scrolling slightly, as items that should remain stationary in the air like Flippers and Party Balls will move slowly. Also, the Great Fox's wings will sometimes touch the sea under it, though swimming is impossible even in Brawl and Ultimate.
When Pokémon Trainer is used on this stage, there will be an extra smaller ship for the trainer to stand on in the background.
Ω forms and Battlefield form
In Super Smash Bros. for Nintendo 3DS, the Ω form replaces the Great Fox with a flat platform resembling some of the buildings in the background. Arwings and Wolfen no longer appear.
In Super Smash Bros. Ultimate, the Ω form and Battlefield form are set on a slightly redesigned version of SSB4's Ω form; however, it is resized and reshaped to match Final Destination and Battlefield, respectively. The three soft platforms of the Battlefield form are metallic and are unique to this form.
The planet Corneria first appeared in Star Fox (Starwing in the PAL region) and has appeared in numerous Star Fox titles since; however, this stage is based on its appearance as the first level of Star Fox 64 (Lylat Wars in the PAL region), in which Corneria City, the capitol of Corneria, is attacked by Andross's army. Unable to defeat the advancing army lead by Granga, General Pepper of the Cornerian Army hires Star Fox to aid them. When Star Fox arrives, they fly through the ruined city to drive off the enemy forces and later fly outside the city to locate and defeat Granga. In this stage, the Great Fox flies the same route that Star Fox takes in Star Fox 64; however, Corneria City is not damaged and is more densely populated. In Ultimate, Corneria City bears resemblance to its appearance in Star Fox Zero.
The Great Fox, Star Fox's mobile headquarters, acts as the main platform of the stage; the Great Fox is shown on the planet in the introduction of Star Fox 64, and it is seen flying over Corneria's surface again during the end credits. Also in this stage are Arwings and Wolfen, piloted by Star Fox and Star Wolf, respectively, that occasionally appear to act as small platforms. All three aircraft are based on their appearances in Star Fox 64, and the Arwings apparently have one Laser Upgrade as they fire two lasers at once as opposed to the standard one.
While it was allowed as a counterpick stage in Melee in the past, Corneria is usually banned from standard tournament rulesets because of stage hazards such as the Arwings as well as issues with camping, its very low ceiling (in Brawl), and wall infinites such as Fox's shine infinite in Melee and King Dedede's infinite chain throw in Brawl, both done against the backside of the Great Fox's dorsal wing which functions as a wall. The Great Fox's laser fire also serves as an extremely powerful stage hazard.
Super Smash Bros. Melee
Super Smash Bros. Brawl
Super Smash Bros. for Nintendo 3DS
Super Smash Bros. Ultimate