Downloadable content, usually abbreviated as DLC, is additional content available to download after a game's launch. DLC was first confirmed for Super Smash Bros. 4 in the "Super Smash Bros. for Wii U: 50-Fact Extravaganza" video presentation on October 23rd, 2014. Downloadable content for the game includes new playable characters, stages, and even new features. Paid content for Super Smash Bros. for Wii U can be found for purchase on the Nintendo eShop, and paid content for Super Smash Bros. for 3DS can be found in an in-game DLC shop.
Main article: List of updates (SSB4-3DS)
Main article: List of updates (SSB4-Wii U)
Updates to the game can be downloaded at no extra cost. To purchase DLC, the game must be updated to the latest version, which is usually done automatically when starting the game. Certain updates also adjust game balance and mechanics, as well as fix bugs and other errors. Change-logs for all updates can be found with the links above. Nintendo has not released any detailed information with official announcements.
As with any other game, DLC data is added via free updates. Completing a transaction to receive DLC is merely a "ticket" to grant access to said content. This means DLC that has not been purchased in an updated version is still technically installed but locked, and thus can be accessed indirectly. Content that has not been purchased can be seen and played against with opponents connecting via a system that has DLC paid for. ("With Anyone", "With Friends", and local Nintendo 3DS Versus). Using amiibo as Figure Players (FPs), saving uploaded or shared replays, and even illegal hacking are some alternative methods without the need of people with DLC.
Similar to clone characters, DLC characters are recognized by being placed in their own area on the character selection screen, regardless of which franchise they hail from. On the 3DS version, when more than four DLC characters have been purchased and all other characters have been unlocked, the DLC characters are placed on a separate page labeled "Extra Fighters".
DLC characters also lack custom moves and all have a generic, once unused Palutena's Guidance scene; while there are no officially cited reasons for this, the former is presumably due to resource (time and/or budget) constraints and the latter is presumably due to otherwise needing to repeatedly bring back voice actors each time a character would be released.
Mii Fighter costumes
Additional costumes for the Mii Fighters are available as paid DLC.
Trophies of fighters for All-Star Mode and Classic Mode are included upon purchasing the fighter, as well as additional trophies:
Note that DLC bundles are incrementally discounted based on the amount of content within them.
Downloadable characters can be bought for one version at full price or both versions discounted. There are three levels of pricing for characters: veteran characters are the least expensive, the sole Nintendo newcomer is slightly more expensive, and third-party characters are the most expensive (and are each packaged with a stage). Additionally, characters can be bought in bundles, which includes any stage a character was included with. Characters are priced at:
Stages can be bought for one version at full price or for both versions discounted. Stages that come bundled with a character cannot be purchased separately. Stages are priced at:
Mii Fighter costumes
As with characters, downloadable Mii Fighter costumes can be bought for one version at full price or for both versions discounted. These can also be bought individually, or in a bundle that includes all Mii costumes added in a particular update. The first 3 bundles all cost the same. They are priced at:
Full DLC Collections
Also available for purchase are collections that include all DLC released in a particular update. These vary in price depending on the amount of content.
DLC Trailer Video