Cutter

"A boomerang that returns to your hand after being thrown. You can charge it up, steer its flight path upward or downward, and use it to cut ropes!"

Cutter is one of Kirby's Copy Abilities, debuting in Kirby's Adventure. It is commonly regarded as the main projectile-based ability in the series.

General Information
Cutter gives Kirby the ability to utilize an infinite amount of curved, boomerang-like blades that appear on the cap he acquires. If the cutter misses Kirby on its return, it will keep going on behind him. Players can uses this tactic to attack enemies behind Kirby without turning around. In later games, Kirby can guide the blade upwards and downwards after throwing it.

In Kirby 64: The Crystal Shards, the "blade" Kirby uses is actually his own face, which peels off his body and travels forward. In Kirby's Return to Dream Land, Cutter Kirby can charge his cutter to make it larger and more powerful. Doing this also allows it to bounce off of surfaces several times.

Kirby: Right Back at Ya!
Cutter Kirby in Kirby: Right Back at Ya! uses the same duck hat as the later games, and appears whenever Kirby manages to inhale things like blades and saws (anything that's sharp except for an actual sword). It is revealed here that the Cutter that Kirby uses is stored on the hat when it isn't in use. This version of Cutter is based on the Kirby Super Star version, but with new attacks. Cutter Boomerang is the primary attack, but Kirby often uses Final Cutter to finish off enemies.

Transformation Sequence
In the transformation sequence, the Cutter cap lands on Kirby's head and spins before bouncing and coming to a stop in the proper position. The Cutter appears and flies around Kirby, then lands on his cap from behind.

Trivia

 * The flavor text in Kirby: Nightmare in Dream Land, as well as the ability icon, is a reference to the anime, Kirby: Right Back at Ya!
 * In Kirby Super Star, the Cutter Boomerang was blue whenever it was in use. In every subsequent game afterwards, it remained yellow when used (except for Kirby: Squeak Squad where obtaining its copy scroll changed it to a larger, stronger, and blue blade; Kirby Super Star Ultra only retained this when used as a sword).
 * In most games, Kirby can throw multiple cutters, but in Kirby 64: The Crystal Shards, he can only fire one at a time because he uses his own face as the cutter. Though humorous, it leaves Kirby vulnerable; he is unable to fly or attack again until his face returns to his body.
 * Kirby could use Link's boomerang after swallowing the latter in the original Super Smash Bros., similar to the Cutter ability. In later Super Smash Bros. games, Link used a bow and arrow as his neutral B, therefore Kirby gained a bow after swallowing him instead of a boomerang.
 * The bill of Cutter Kirby's hat in the games is white, but it is yellow in Kirby: Right Back at Ya!.
 * In Kirby's Return to Dream Land, there was originally going to be a super version of the Cutter ability, but it did not appear in the final version.
 * Cutter, along with Animal and Circus, are the only abilities to include eyes as part as their attire.
 * Pre-release screenshots of Kirby 64: The Crystal Shards reveal that the colors of Cutter and Needle's ability icons were swapped; Cutter was originally orange and Needle was originally green.