and Melee in the former it is a regular fixture of its competitive scene and is also known as a "Twelve Character Battle". This format presides mostly within the original Super Smash Bros.
It is occasionally done as a side-event at some tourneys, the most famous instance being Mango's and Mew2King's full roster Ironman at Smash the Record. This type of Ironman is functionally similar to a normal Ironman, but involves each player using the full roster instead of a set number of characters. An Ironman match ends once one player depletes all of their opponent's stocks for every character, with the surviving player being the winner. The winner of the prior game starts the battle with their character's remaining stocks from the prior game, and therefore self destructs to match their prior stock count before the next game starts proper. When a player loses all of their character's stocks, they pick another character and counterpick a legal stage. They then pick their opening characters before the battle, and either mutually agree to the opening stage or stage strike among the starter stages to decide it. in Melee they would have 4 stocks, while in Ultimate they would have 3 stocks). Both players pick a set amount of different characters (typically between 5 to 10 characters, but can be any amount up to the number of available playable characters), with each character having a set amount of stocks, usually based on the game's tournament standard (e.g.