Danger Zones spell horrible doom for their victim in the Smash Run of the 3DS version. Whoever touches them will die instantly. The racing and climbing Final Battles that can occur after the Smash Run's main event have danger zones that disappear upon their activation. In the Wii U version, Danger Zones have their behaviour changed: inflicting great damage to the character that touches them, and if it is someone with over 100% damage, the target will be instantly K.O.. Danger Zones take their colour design from red lava. Danger Zones retain their vehaviour in Super Smash Bros. Ultimate, although their target takes bludgeoning damage instead of fire damage.
- Danger Zones trace their origin to the dangerous lava pools in Kirby Super Star's (and Ultra's) Great Cave Offensive
- Certain Final Smashes and hazards have similar properties to Danger Zones.
- When the Leviathan floods Midgar with his Tsunami, any fighter (other than the summoner) who gets damaged at or above 100% will die instantly.
- When Gomorrah knocks his target above 100% or higher as Bayonetta does her Infernal Climax, the victim will die instantly.
- When Bowser uses his Final Smash in Super Smash Bros. Ultimate and his target ends up at 60% or higher, that target will suffer an immediate Screen KO.
- Zelda will kill fighters that accumulate 100% or more after the attack with her Final Smash.
- Ridley will kill fighters that accumaulate 110% or more as a result of his Final Smash.
- Joker can kill fighters that accumulate 115% or more a as result of his Final Smash.
- According to the Prima Games Guide for Super Smash Bros. 4's Wii U version, Danger Zones will instantly kill a target who accumulates 125% or more as a result of their effect. Hacking the game to change how much damage you take coming into contact with them, however, will make this untrue.