Miiverse

Miiverse is a stage in. It was revealed during the Super Smash Bros. for Wii U: 50-Fact Extravaganza on October 23rd, 2014, and added to the game in version 1.0.8 on June 14th, 2015. It featured a unique stage element: user-created Miiverse posts drawn in support of a particular fighter would appear in the background. Due to the discontinuation of the Miiverse service, these posts no longer appear as of November 8th, 2017.

Stage layout
Its layout is similar to, though it is slightly wider, the platforms are longer, and the ceiling is slightly higher, giving it the highest ceiling among SSB4's legal stage list.

Selected messages created by users appeared in the background, intended to cheer the fighters on. Users were able to post drawings for each character in dedicated Miiverse communities, which would then appear when that character participated in a match. The post's border color corresponded to the slot of the character the post was cheering for. During the results screen, players had the option to send a post directly to Miiverse community to the character who won the match. This prompt occurred even if Miiverse was disabled on the system, but would not appear if playing with amiibo, seemingly due to the inability to suspend the game while amiibo are in use.

This stage is not available when playing against others online, making it the only stage with that restriction. When playing locally, this stage can be played even with the Wii U not connected to the Internet. Doing so will cause no messages to appear; this was the case even when the service was active.

Certain events caused additional Miiverse posts to appear:
 * When a Smash Ball appeared, one message for each fighter popped up. When a character acquired one, numerous posts for that character quickly popped up and stayed that way until the character lost the Smash Ball or their Final Smash ended.
 * When the crowd was about to cheer for a fighter, up to four messages appeared for that fighter.
 * Ordinarily, a larger message would pop up cheering on a character who has attained a KO, but sometimes a message for the KO'd character would show up instead. If the KO is done via meteor smash, one message for each character would appear, and the KO'd character's message would shake.
 * When completing Dragoon or Daybreak, two messages appeared for the character who assembled the item.

The Miiverse social network was discontinued as of November 8, 2017; after that date, this stage no longer has posts displayed in the background, and users are not able to post new drawings to its communities.

Ω form
The Ω form removes the thin platforms and resembles a smaller version of the Online Practice Stage. In addition, the length of the stage increases slightly to match that of Final Destination. While the service was active, Miiverse posts would still appear in the background as long as players were connected to Nintendo Network.

Origin
Miiverse's appearance is based on its namesake's interface: they both feature a white and green color scheme, as well as a gray checkered background.

Update History
 

Tournament Legality
Miiverse is either considered legal as a purely cosmetic Battlefield alternative or banned due to its redundancy as a semi-clone of said stage. When the service was active and the Wii U was connected to the internet, the posts in the background could be distracting for players and may contain inappropriate material. However, with Miiverse now closed, no posts will appear in the background, helping the stage's case for legality.

Trivia

 * Miiverse is the only downloadable stage that is completely unavailable in 8-Player Smash.
 * Miiverse and Pirate Ship are the only downloadable stages in not available on.
 * Miiverse is also the first stage in the series to be added through a free update, followed by Duck Hunt in and Small Battlefield in Ultimate.
 * Any snapshots and replays that were taken on this stage could not be shared, even before Miiverse shut down, nor could snapshots taken there be painted on.
 * If a Nintendo 3DS is being used as a controller, the stage becomes unavailable.
 * Replays would record where and when posts appeared but did not record post content. Therefore, until Miiverse was shut down, it was possible to see different posts every time a replay was watched.
 * Miiverse is the only stage from the Wii U version to not appear in the Special Orders mode.
 * Miiverse is one of five stages from Super Smash Bros. for Wii U not to return in Ultimate, the others being Pyrosphere, Woolly World, Jungle Hijinxs and Orbital Gate Assault.
 * Miiverse is also the only downloadable stage in SSB4 (including returning stages) to not return in Super Smash Bros. Ultimate. The exclusion is due to the discontinuation of the Miiverse service (and its lack of inclusion on the Nintendo Switch) reducing the stage to a basic clone of Battlefield and therefore redundant.
 * If Miiverse is considered tournament legal after the service shut down, this would also be the only tourney legal stage to not appear in Ultimate.
 * Due to the shutdown of the Miiverse service preventing posts from appearing in the background, Miiverse is the only versus mode stage in Smash history to no longer have all of its features function properly.