Flame

Flame, also known as fire, is a kind of effect in the  series that debuted in Super Smash Bros. Targets hit by flame attacks are momentarily set on fire, flashing red and orange, and in Ultimate, will appear visibly scorched.

In addition, flame attacks have several other effects:
 * They thaw frozen characters (prior to Ultimate).
 * They cause Blast Boxes, Bombers, Link's s and Remote Bombs, and Young Link and Toon Link's Bombs, to detonate instantly and Steve's TNT to detonate more quickly.
 * They do no damage to Red, which will not flinch.
 * In Super Smash Bros. Brawl, due to type effectiveness they deal 1.1x knockback to and 0.9x knockback to.
 * In Brawl and SSB4, flame and electric attacks make Hotheads grow larger and more powerful (in Ultimate, all attacks can do this, albeit not as quickly).

Flame attacks are boosted by Flame Attack stickers in Super Smash Bros. Brawl's The Subspace Emissary and in Super Smash Bros. Ultimate by the primary spirit trait Fire Attack ↑, the support spirit skill Fire & Explosion Attack ↑, as well as certain Spirit Battle conditions. Flame attacks are resisted by Flame Resist stickers in Brawl and the spirit trait or skill Fire/Explosion Resist ↑ in Ultimate. These attacks also deal more damage to fighters equipped with a primary spirit with the trait Fire Weakness in Ultimate.

Flame is by far the most common "elemental" attack in the Super Smash Bros. series, with over half of Brawl's roster having access to at least one flame attack. Most explosive-type attacks use the flame effect.

By stage hazards
In addition to natural stage hazards, the Spirit Battle condition "The floor is lava" creates a hazard that inflicts flame damage.

Trivia

 * Contrary to popular belief, none of Terry's special moves, including super special moves and Final Smash, use the flame effect. Rather, they possess the normal effect.