Mistletoe

About
Kirby's dog, an evil chihuahua (though breed is never specified in the texts) of incredible intellect and with the ability to speak English. He is a recurring antagonist, and the main antagonist of several parts, driven by a grudge from Kirby's devouring his candy and never apologizing. He is an ally in his final appearance, offering information regarding Marx's plans.

Kirby's Cornfuffs 1 - Part 1
Mistletoe first appears in the original Kirby's Cornfuffs Part 1 under the name "Misletoe" (sic), where Kirby eats his stocking of Christmas candy and causes a deep-seated grudge that would last against his owner for a long time. His only line here is an exclamation of grief.

Kirby's Cornfuffs 1 - Part 10
Mistletoe is not named, but appears as "???," the main antagonist in Part 10 of Kirby's Cornfuffs 1. He reveals that he works for King DDD, but has his own agenda, and that Bronto Burt is expected to serve both of them. He lures in Klub3, Stone Kirby, and Rock N Roll Kirby, and then, announcing this was only his lunch break, does something horrible to them (later revealed to be trapping them in the caverns).

Meta Knight Story - Kirby's Cornfuffs 3
Mistletoe makes his next appearance as a mysterious antagonist in the cliffhanger in Part 10 of "Meta Knight Story," AKA Kirby's Cornfuffs 3 (not to be confused with Kirby's Cornfuffs 1 Part 3). After King Quackers defeats Dynablaze with King's Diamond Attack: Beam of Crash, N.M.E. appears and turns King Quackers back into King DDD with his evil magic. Immediately after, a loud noise is heard and a remote with a mysterious button falls out of nowhere, which Gooey presses, causing a huge explosion. After the explosion, Kirby and King Dedede awaken in a mysterious room where evil laughter and shrieking is heard (belonging to Mistletoe), and this story is also left on a cliffhanger.

Mistletoe's Revenge - Kirby's Cornfuffs 4
His next, and most major, appearance is in "Mistletoe's Revenge," AKA Kirby's Cornfuffs 4 (not to be confused with Kirby's Cornfuffs 1 Part 4). Mistletoe announces his presence over a loudspeaker in his lair and demands Kirby return the candy he ate in Kirby's Cornfuffs, letting Kirby starve to death in the meantime. He conspires with King DDD and Magman to fulfill DDD's plan to kill Kirby, filling the cavern the room is in with lava. Klub3, Stone Kirby, and Rock N Roll Kirby are in an adjacent cave after being captured in Kirby's Cornfuffs 1 Part 10, and are half-submerged in lava before the Kirby Kousins fly in and pull them out, flying away with them.

They then presumably return to save Kirby, since Kirby is free in the climactic scene as well. Klub3 interrogates Mistletoe, Fololo comments that Mistletoe must have been under hypnosis to turn evil, and Kirby replies that he's pretty sure Mistletoe is just like that. One of the Kirby Kousins gives Mistletoe back an equivalent amount of candy to what was taken from him, and he apologizes, stating his motive to be that nobody ever apologizes for the wrongdoings they do to him and pleading with the others to stop Magman and DDD. DDD announces Magman is not a threat, but he is, and Mistletoe bites DDD, causing him to run off in the story's ending.

Meta Knight Returns - Kirby's Cornfuffs 5
Mistletoe appears briefly in the continuation, "META KNIGHT RETURNS!" AKA Kirby's Cornfuffs 5 (not to be confused with Kirby's Cornfuffs 1 Part 5). Mistletoe warns them of a rumor he heard, that the Halberd was spotted flying past Mt. Aqua, where it met with Marx's Castle, entered, and then it all vanished. This is Mistletoe's final appearance.

Aftermath
Mistletoe is not present for the arcs/fights with Meta Knight Senior, Dynablade Senior, Dynablade Senior Senior Senior, Dynablaze, or Mega Knight; and as Legend of the Ice Part 3 was never released, his ultimate post-apocalyptic fate--and the role he would have played in the unfinished ultimate Kirby vs. the Antichrist arc--is unknown.

Quotes:
''"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII!" -Mistletoe's grief at losing his Christmas candy''

''"SHREEEEEEEEEEK! ROAR! BWAHA!" -Mistletoe's glee at capturing his old owner Kirby''

''"HELLOOOOOO!!!" -Mistletoe's ominous greeting over loudspeaker in the cavern room''

''"Kirby. Return the candy you stole from me last Christmas!" -Mistletoe's final ultimatum''

''"ALLS WELL BOSS! I TRAPPED KIRBY IN THE CAVERN AS ORDERED!" -Mistletoe to DDD, his unlikely comrade''

''"Thanks... sorry about that... it's just nowone ever apoligises and... and... AND YOU GOT TO STOP DDD AND MAGMAN!" -Mistletoe's apology''

''"Oh ya! and there is a rumer flowin' around... Some Waddle De guy said... He said... Meta Knights ship was floating right by his window! Said it flew past Mt. Aqua... Then, some wierd Castle appeared, it went in, then the whole ship AND castle (Gulp) VANISHED! Said it must of make a mark when it landed in the castle, but he also said he was probable dreaming." -Mistletoe's ominous and prophetic warning''