Kirby using Inhale.
|Effect||Kirby inhales opponents into his mouth, allowing him either to spit them out or take their neutral special move for himself.|
When performed, Kirby opens his mouth and inhales, sucking nearby opponents into his mouth. While an opponent is in Kirby's mouth, Kirby can walk around and jump with them for a short period of time before they escape automatically. Kirby can also spit them out as a star with the attack input, dealing 10% damage to the opponent. Most notably, he can swallow them with the down input or special input, dealing 6% damage to the opponent. By swallowing an opponent, he absorbs their neutral special move as a "Copy Ability" and can use it himself as his neutral special move instead. For each ability he has, he will gain a different hat allusive to the opponent he absorbed; obtaining Mario's cap, Mega Man's helmet, Lloyd's hair, etc. (see below for a complete compilation of revealed Kirby Hats). Once an opponent's neutral special move is acquired, the player can use a taunt to discard it and revert to Inhale. It will also be discarded if Kirby is KO'ed or damaged enough.
|Image||Character power acquired||Description|
|Bandana Dee||Kirby will be able to use Beam Whip and Wave Beam and will have Bandana Dee's bandana.|
|Black Mage||Kirby will be able to use Stop and will have Black Mage's hat. His eyes will be yellow and part of his face will be black when he uses Stop.|
|Bomberman||Kirby will be able to use Bomb and will have Bomberman's antenna. However, since Bomb Detonate is needed to make the bombs explode, Kirby's bombs explode on contact.|
|Bowser||Kirby will be able to use Fire Breath and will have Bowser's hair and horns.|
|Captain Falcon||Kirby will be able to use Falcon Punch and will have Captain Falcon's helmet.|
|Chibi-Robo||Kirby will be able to use Chibi-Blaster and will have a helmet of Chibi-Robo's head.|
|Donkey Kong||Kirby will be able to use Giant Punch and will have Donkey Kong's hair spike.|
|Falco||Kirby will be able to use Blaster and will have Falco's crest and beak.|
|Fox||Kirby will be able to use Blaster and will have Fox's ears.|
|Ganondorf||Kirby will be able to use Warlock Punch and will have Ganondorf's hair and crown.|
|Goku||Kirby will be able to use Kamehameha and will have Goku's hair.|
|Ichigo||Kirby will be able to use Getsuga Tenshō with a smaller version of Zangetsu and will have Ichigo's hair.|
|Isaac||Kirby will be able to use Vine and will have Isaac's hair.|
|Jigglypuff||Kirby will be able to use Rollout and will have Jigglypuff's ears and a curled tuft of hair on his head.|
|Kirby||Kirby will not be able to copy an ability from another Kirby, unless that Kirby already has an ability from other characters.|
|Krystal||Kirby will be able to use Sniper Rifle and will have Krystal's hair and ears.|
|Link||Kirby will be able to use Hero's Bow and will have Link's hat.|
|Lloyd||Kirby will be able to use Demon Fang with the Flamberge and will have Lloyd's hair.|
|Lucario||Kirby will be able to use Aura Sphere and will have a Lucario hat with the ears. Additionally, Kirby will be affected by Aura.|
|Luffy||Kirby will be able to use Gum-Gum Pistol and will have Luffy's straw hat.|
|Luigi||Kirby will be able to use Fireball and will have Luigi's cap.|
|Mario||Kirby will be able to use Fireball and will have Mario's cap.|
|Marth||Kirby will be able to use Shield Breaker with a shorter version of the Falchion and will have Marth's hair.|
|Mega Man||Kirby will be able to use Mega Buster and will have Mega Man's helmet.|
|Meta Knight||Kirby will be able to use Mach Tornado and will have Meta Knight's mask. However, unlike Meta Knight's mask, which has yellow eyes due to Meta Knight having white eyes, Kirby's mask has green eyes due to Kirby having blue eyes.|
|Mr. Game & Watch||Kirby will be able to use Chef and will have the Chef hat from the Game & Watch game, Chef.|
|Naruto||Kirby will be able to use Rasengan and Fūton: Rasenshuriken (when fully charged) and will have Naruto's hair and headband.|
|Ness||Kirby will be able to use PK Flash and will have Ness's cap.|
|PAC-MAN||Kirby will be able to use Bonus Fruit and will have PAC-MAN's eyebrows and a pink recolor of his nose.|
|Peach||Kirby will be able to use Toad and will have Peach's crown.|
|Pichu||Kirby will be able to use Electro Ball and will have a Pichu hat with the ears and tail.|
|Pikachu||Kirby will be able to use Thunder Jolt and will have a Pikachu hat with the ears and tail.|
|Pit||Kirby will be able to use Palutena's Bow and will have Pit's laurel crown and smaller versions of his wings.|
|Rayman||Kirby will be able to use LockJaw and will have Rayman’s hair.|
|Ryu||Kirby will be able to use Hadoken (all three forms) and will have Ryu's hair and headband.|
|Samus||Kirby will be able to use Charge Shot and will wear Samus's space helmet.|
|Sandbag||Kirby will be able to use Capsule Spawn and will have a hat modeled after the top of Sandbag.|
|Sheik||Kirby will be able to use Needle Storm and will have Sheik's hair and bandages.|
|Simon||Kirby will be able to use Axe and will have Simon's headband and hair from the North American and European box art for Super Castlevania IV.|
|Sonic||Kirby will be able to use Homing Attack and will have Sonic's ears and quills. The poses he makes after landing Homing Attack are uniquely based on poses made in the Kirby series.|
|Sora||Kirby will be able to use Strike Raid with the Keyblade and he will have Sora's hair.|
|Tails||Kirby will be able to use Energy Ball and will have a Tails hat with the ears and two tails.|
|Waluigi||Kirby will be able to use Waluigi Dice and will have Waluigi's cap.|
|Wario||Kirby will be able to use Chomp and will have Wario's cap.|
|Yoshi||Kirby will be able to use Egg Lay and will have a Yoshi hat showing the eyes and head.|
|Zelda||Kirby will be able to use Nayru's Love and will have young Zelda's headdress from The Legend of Zelda: Ocarina of Time.|
|Zero Suit Samus||Kirby will be able to use Paralyzer and will have Zero Suit Samus's ponytail.|
Inhaling and spitting has been Kirby's trademark attack since Kirby's Dream Land, but it was not until Kirby's Adventure that he was able to swallow an enemy to copy their attack. Kirby Super Star introduced unique hats indicating different Copy Abilities. A single attack from an enemy or damage incurred from the environment was usually enough to make Kirby lose his Copy Ability, though later Kirby games feature entire health bars instead of health points, so it is possible for him to occasionally keep his Copy Ability even after being damaged. After Kirby loses it, it takes the form of a star bouncing around the screen. Kirby can inhale and swallow it to regain the ability before it disappears after it contacts a hazardous surface or enough time passes.
- Kirby does not have this ability in the original Super Smash Flash due to Cleod9's inability at the time to properly code Copy Abilities. In compensation, he instead gave Kirby the ability to tag out with Meta Knight at any time.
- This special move has given the developers a lot of work due to needing to sprite each hat to represent what power Kirby possesses. To go along with this, if something were to change to a character's neutral special move then the corresponding Copy Ability would have to change as well.
- When copying Donkey Kong, Samus, or Mr. Game & Watch, Kirby's appearance differs from that of official Super Smash Bros. games due to the limitations of the engine not being able to accurately represent the originals, which covered his entire body.
- When copying the Fighting Silhouette Team, Kirby will still gain the ability of the character the silhouette is mimicking despite the silhouettes not being able to use the special move copied themselves. This is unique among the Enemy Teams, whereas with those in the official Super Smash Bros. games, attempting to copy them would simply fail.
- Prior to v0.3a of the demo, Kirby did not have a hat after he inhaled an opponent, plus he did not inhale the opponents at all; instead, he would inhale a small star from them.
- Kirby is unable to use Inhale against characters during Transformation Final Smashes due to being immune to grabbing. However, prior to v0.5a, Kirby was able to suck them in and gain unique Copy Abilities from them. This was changed in order to prevent cheapness.
|Kirby's special moves|
|Neutral special move||Inhale|
|Side special move||Hammer|
|Up special move||Final Cutter|
|Down special move||Stone|
|Final Smash||Cook Kirby|