Jack & Elmo

Jack & Elmo are a duo competitor in the King for Another Day Tournament. The duo consists of Jack Black and Elmo, and the competitor is a reference to Jack Black's appearance on Sesame Street. They were selected by the art team.

Rips
Jack Black's voice clips appear in several rips, mostly as a sub-source of rips featuring SpongeBob Edited, which sample the Tenacious D song "Inward Singing". Less often, he is referenced through the use of the Sesame Street skit "Jack Black defines Octagon, referencing the YTPMV fad.

King for Another Day Tournament

 * "Hey, how’s it going? He’s Jack, and with his friend Elmo, he’s going to educate the tournament on the magic of octagons! Complete with a stop sign and great tunes, Jack and Elmo will stop at nothing to become the kings of this tournament."
 * —Jack & Elmo's description on the MOJO!!

Jack & Elmo were revealed in the "SiIva Direct • SiIva Lighthouse Live ∣ E3 2019". Their source list includes rips related to Sesame Street and The Muppets, rips related to Tenacious D and Jack Black, and rips related to edutainment games.

Jack & Elmo scored a narrow victory against Rhythm Masters, and then beat Donkey Kong. They were knocked to the Loser's Bracket by Daft Punk ft. Pharrell, and then eliminated by Mariya Takeuchi.

Quotes
Lines without a link come from the "All Vs/Victory Lines" video.

Trivia

 * Jack and Elmo have the record for closest match winner yet, beating Rhythm Masters by only a 20 vote difference.
 * According to BobTheTacocat on Discord, Jack & Elmo have edutainment game rips because "SiIvaGunner is about video games".
 * Counting their victory theme, Jack and Elmo have exactly 8 solo promotional rips.

Quotes

 * Their vs. quote against Metal Ajit Pai references their first encounter with Jack Bros. in the Mojo which was first mentioned in Jack Bros.' interview, and was also mentioned in their interview as well.
 * Their vs. quote against Geno references the Sesame Street song "Can You Tell Me How to Get to Sesame Street?"
 * Their vs. quote against Off the Hook ft. Paruko references Jack Black's "Eight awesome angles!" line from his appearance in Sesame Street.
 * Their quotes against "Weird Al" Yankovic reference Jack Black's appearance in the video for Weird Al's "Tacky".
 * Their vs. quote against Pitbull and the Aliens includes Elmo mistaking either Marcianito or Popoy as Kermit due to their green and thin-like appearances.
 * Their victory quote against Pitbull and the Aliens references the movie Nacho Libre, in which Jack Black plays as the main character Ignacio.
 * Their quotes against Nintendo Power references the many times Jack Black couldn't get his Elgato to work in some of his videos on the channel JablinskiGames.
 * Their quotes against Men in Black reference Sesame Street characters the Martians.
 * Their victory quote against Men in Black also references Jack Black's "Come on, let's go find an octagon!" line from his appearance in Sesame Street.
 * Their victory quote against ZUN references the game Brütal Legend, in which Jack Black played the main character Eddie Riggs.
 * Their vs. quote against Thanos is a reference to the Gauntlet of Wooden Warriors, which are rotating, steel-studded wooden posts from Kung Fu Panda.
 * Their quotes against Wario Partners, LLP references Wario: Master of Disguise and another of Jack Black's appearances on Sesame Street where he calls himself a "master of disguise".
 * Their vs. quote against King Dedede includes Elmo mistaking him as Big Bird, as both are yellow and have bird-like appearances.
 * Their victory quote against King Dedede is a reference to the video The Glorious Octagon of Destiny where a part from the Eric Andre show plays during the Hilltop Chase section.
 * Their vs. quote against Solid Snake references Jack Black's role as Po in the movie Kung Fu Panda.
 * Their vs. quote against DJ Professor K and victory quote against Nico Nico references Jack Black's "Eight glorious sides!" line from his appearance in Sesame Street.
 * The victory quote can also be seen as a reference to the famous YTPMV "8 Sides of Nico Nico Douga".
 * Their victory quote against DJ Professor K references the Sesame Street segment "The Letter of the Day".
 * Their vs. quote against Adam Levine references American actor Adam DeVine, a person Jack Black met.
 * Their victory quote against Adam Levine references the Maroon 5 song "Payphone".
 * Their vs. quote against Johnny Bravo references Jack Black's roles in various media.
 * Their vs. quote against Mr. Krabs references the Sesame Street character The Count.
 * Their victory quotes against Mr. Krabs is a reference to the fact that Jack Black hosted the Nickelodeon Kids' Choice Awards at least 3 times.
 * Their victory quote against Mariya Takeuchi references the Sesame Street character Abby.
 * Their vs. quote against Daft Punk ft. Pharrell references the Daft Punk song "Within".
 * Their victory quote against Daft Punk ft. Pharrell references Pharrell Williams' appearance on Sesame Street.
 * Their vs. quote against Papyrus references the character Mr. Noodle, a silent character who appears in the Sesame Street segment "Elmo's World".
 * Their victory quote against Papyrus references the fact that Jack Black's children are fans of Papyrus' brother Sans.
 * Their vs. quote against Dr. Piccolo references the Daily Dose meme.
 * Their vs. quote against Jack Bros. references the film Tenacious D in The Pick of Destiny, in which Jack Black's character has a rockoff with the devil.
 * Their victory quote against HOBaRT references the Sesame Street character Cookie Monster.
 * Their victory quote against MissingNo. is a reference to a news article explaining a defective "Elmo Knows Your Name" toy that says "Kill James".
 * Their vs. quote against The Jazz Cats references the Sax-A-Boom instrument that Jack Black usually plays.
 * Their victory quote against The Jazz Cats references the Tenacious D song "Simply Jazz".