Trident Knight wears armor that is usually purple in color, sports a moon crescent resembling those seen on Feudal Japanese armor, and shoes that are red. It carries around a supply of electrifying tridents.
Trident Knights are one of the four Meta-Knights that serve as a recurring mid-boss. Once Kirby enters a certain room, Meta Knight makes a command before disappearing, and his minions appear. Trident Knight simply sits upon a ledge and tosses tridents at Kirby. These fork-like objects are electrified. Even so, neither these nor Trident Knight give Kirby any ability. Trident Knight will either appear or run in from a side of the screen.
Trident Knight behaves the same as in previous games, but appears without the requirement of Meta Knight's command. Alongside its usual trident tossing, it also has a new form of attack: it can jet at Kirby, attempting to stab him with the trident currently in his hand. Trident Knights can be summoned by Galacta Knight, these being dark purple and sea green in color. It is weak to the Zap element.
Trident Knight makes an appearance in two sub-games in Kirby Mass Attack. It appears in Strato Patrol EOS at the end of the 4th stage alongside Axe Knight when Javelin Knight and Mace Knight are defeated. It attacks by diving downwards and under the screen with its trident outstretched. It then pops up in a random place before flying upwards and repeating the process. It also appears in Kirby Quest in Chapter 3 where it is fought with the rest of the Meta-Knights.
In Meta Knightmare Returns, Meta Knight can call upon Trident Knight, along with the other the original Meta-Knights from Kirby's Adventure, to perform his strongest special attack, Meta Knightmares, in which they slash through any and all enemies on screen with their respective weapon. Trident Knight also appears celebrating in the sub-game's ending.
In the Super Smash Bros. series
- Trident Knight and Javelin Knight are the only Meta-Knights that don't participate in the dialogues of the Halberd's crew in Kirby Super Star.
- Some of Trident Knight's idle and damaged poses indicate that its visor uses some kind of tracking system or radar to see. This guess comes from the red bars of color that can occasionally be seen on its visor. This may mean that Trident Knight is robotic much like Javelin Knight and that his inherent ability to glide may also stem from his mechanical nature.