Ninja is a copy ability first seen in Kirby Super Star. It is best known for being one of the fastest abilities, meaning it is able to deal steady damage in a short amount of time. In order to do sufficient damage though, Kirby must execute many attacks at a time. This is because Ninja is predominantly projectile-based. Because these projectiles are weak on their own, Kirby must remain at a safe distance and throw tons of them at the enemy. This is where Ninja Kirby's quick reflexes come in handy. This ability also allows to cling to walls and jump-climb them.
In Squeak Squad, Ninja was given more properties based off the stereotypical Ninjas rather than the traditional kind demonstrated in Super Star. These properties entail walking on water and harnessing "jutsu" (simply Japanese for method or trick).
The Ninja hat originally had the same design as the Stone hat, only with different colors. In Squeak Squad, Kirby no longer turns purple and has a cape rather than a guard on the back (similar to the anime). In Kirby's Return to Dream Land, Kirby wears a skullcap with a metal forehead piece imprinted with a star insignia. He wields a katana like he does in the anime, which replaces his kunai from previous games.
Kirby throws a piercing kunai straight forward. This can be done rapid-fire to deal constant and heavy damage. Kunai have infinite range and can hit an enemy from off-screen.
7 (all hits)
8 (1st hit), 7 (repeat hits)
Kirby swings his knife in front of him. If it does not collide with an enemy, it will be an ordinary slash. If it does, Kirby will create a shockwave that does lots of damage to foes. This move also works in midair, but in Super Star, it will not create a shockwave whether Kirby hits an enemy with the knife or not. The shockwave's range extends much further in Return to Dream Land.
Kirby swings his kunai forward as he dashes. Kirby is only invincible for half the attack. In Squeak Squad, this attack looks like Quad Shock without the shock waves.
8 (1st hit), 7 (2nd, 3rd, 4th hits)
↑/forward + B/Y (Near enemy)
Kirby grabs the enemy or defeated mid-boss, and he will then proceed to jump into the sky and slam the enemy down into the ground with massive force, doing massive damage to anyone in the way. A similar attack was in Fighter's Squeak Squad moveset. The diving hit can't combo with the thrown object's damage.
In the anime, it is known as Mizu no Otoshi (Drop of Water), though the subtitles state there is no translation for it.
Kirby dives diagonally-forward with his foot outstretched to kick his target. He can repeatedly kick the enemy if the player can maintain Kirby's midair altitude.
B/Y (While taking damage)
Kirby becomes invisible. By pressing B or Y, Kirby reappears in an explosion, destroying nearby enemies and damaging bosses.
Kirby throws a shuriken at his foes. This was the equivalent for Super Star's Kunai Throw but this attack deals more damage and is considerably slower. It works when Kirby is wall-clinging, walking on water and in midair as well.
Requires the Ninja Scroll. Kirby starts building up power around himself. Releasing B causes Kirby to slam his fist into the ground, creating multiple fireballs that heavily damages foes. Because this attack is terrain based, if the powerful technique is used near water, the fireballs evaporate on the water, creating steam.
↓ + 1
Kirby creates a puff of smoke around him, slightly damaging nearby enemies. Kirby cannot be damaged while he is hidden by his distraction.
↑, then ↓ + 1
Kirby abruptly rises up and, with a fan in hand, swings downwards to conjure a plantation of cherry blossoms. Both his fan and the blossoms abruptly damage enemies before fading.
Ninja appears in Kirby: Right Back at Ya! in episode 24, Ninja Binge, which is its only appearance. In the anime, Kirby shows moves that can't be used in games. In the transformation sequence, an energy shuriken forms from a flash of light. Autumn leaves blowing in the wind surround Kirby. The shuriken and leaves vanish, forming his hat. He then pulls out a ninjato.
In the Ninja ability's Kirby Super Star artwork, Kirby's skin is pink, however, in the game, Kirby's skin is purple. This was fixed in Kirby Super Star Ultra, where Kirby has purple skin in-game and on promotional artwork.
In Kirby's Return to Dream Land, if Kirby is swimming on the surface of a bed of water with this ability, he will dive right on the surface and breath through a bamboo straw instead of wearing an inner-tube. When he uses his Water Gun attack, water shoots upward out of the bamboo, damaging enemies next to or above him.