Editing No KO

[[Image:No KO.jpg|thumb|A basic example of a No KO stage in ''Brawl''.]]

A standard/typical No KO stage is composed of a square/rectangular area of basic blocks, with spikes (in ''Brawl'') or lava (in ''for WiiU'' and ''Ultimate'') along the top to prevent characters from spawning there. Variations include a triangular shape to cause a slant for items, hindering item usage as soon as they spawn, a more rounded stage to provide an aiming challenge, a stage made of icy blocks, and a roof of drop blocks.

A '''box''' is a common type of KO stage. It is impossible to get knocked out of a box due to its design. There are two main ways to build a box. The first is to simply build a stage-builder stage and make the walls and bottoms of the stage sealed by blocks. Then seal the "top" of the box with spikes and falling blocks. The other method is to have the top, left and right sides sealed by blocks and the bottom as drop through ledges, allowing combatants to enter from the bottom and not be able to leave accidentally. In order to make this easier, another strip underneath can be used to land on before jumping in.

As the stage requires at least one space between the stage border and the blast line, there are several [[Final Smash]]es that allow players to cross this barrier and be KO'd. Ike's [[Great Aether]], {{SSB4|Greninja}}'s [[Secret Ninja Attack]], {{SSB4|Robin}}'s [[Pair Up]], {{SSB4|Cloud}}'s [[Omnislash]], and the {{SSB4|Mii Brawler}}'s [[Omega Blitz]] send the user and the target to the peak of the stage, causing a [[Star KO]] outside of the main play area. {{SSBB|Lucario}}'s [[Aura Storm]] and {{SSB4|Bowser Jr}}'s [[Shadow Mario Paint]] also sends their users to the peak, allowing them to escape, and Pikachu's [[Volt Tackle]] allows passage through solid objects and may culminate outside of the intended arena. {{SSBB|Snake}}'s [[Grenade Launcher]], Olimar's [[End of Day]], and {{SSB4|Zero Suit Samus}}' [[Gunship (Final Smash)|Gunship]] in ''for Wii U'' also put them to the stage peak after the Final Smash is over as they come back down from the top of the screen. All three Star Fox characters' [[Landmaster]]s will put them at the top as well. {{SSB4|Bayonetta}}'s [[Infernal Climax]], if successful, will KO the opponent without regard for the blast lines so long as their damage exceeds 100%. Outside of Final Smashes, it is also possible to escape using a [[Warp Star]] or if all three [[Dragoon]] pieces are collected and used.