A fighter ability, more often referred to as a passive ability, character mechanic, or character gimmick is an unofficial term used in fighting games, including the Super Smash Bros. series, that describes special mechanics specific to certain characters (and/or their clones). They can grant said fighter a passive ability, a chargeable meter, extra moves in their arsenal, or mechanics that are not directly linked to their moveset.
Because they are prevalent throughout the roster, crawling, wall clinging, wall jumps, taking damage while swimming, gameplay-affecting taunts, delayed double jumps, and multiple jumps will not appear in the following list. Additionally, certain moves (namely, Monado Arts and Pocket) have special icons on the character's HUD, but because they do not grant the user extra moves and are directly linked to that specific move, they do not truly count as fighter abilities.
List of fighter abilities