As the name implies, it is a slightly smaller version of Ultimate's Battlefield. Visually, it shares many of the same elements as the original, such as the waterfalls and floating ruins in the background. However, the major difference between the two is the missing top platform, making its layout similar to Pokémon Stadium and Pokémon Stadium 2. Other more minor changes include the top blast zone being lowered slightly to compensate for the missing platform and the remaining two platforms being moved slightly more inward.
According to Masahiro Sakurai on his official Twitter account, the stage was designed mainly for competitive 1-vs-1 battles, as he felt that the regular Battlefield was too wide and Final Destination was too empty for these sort of matches. As such, Small Battlefield was made to be the middle ground of the two.
Much like Big Battlefield, this layout cannot be chosen for the rest of the game's stages. To compensate for this, the development team has given it the option to play all the songs currently available in Ultimate (this ability was also given to Battlefield, Big Battlefield, and Final Destination as a part of the same update).
As it is a variant of Battlefield and Big Battlefield, it shares its different forms with them.
The competitive community has given positive reviews to Small Battlefield, with praise specifically towards its smaller size. However, due to its near resemblance to the Pokémon Stadium stages, its actual legality remains in question, with much of the debate being centered around which of the two should be neutral or counterpick. With a lack of major off-play tournaments due to the 2020 Pandemic still occurring, a decision still remains in the air; it has, however, been deemed legal in several smaller online competitions.
- This is the first DLC stage to represent the Super Smash Bros. series.
- This is the third stage to be added for free, succeeding Miiverse for Super Smash Bros. for Wii U and Duck Hunt for Super Smash Bros. for Nintendo 3DS.
- It is the first free stage in Ultimate.