Original Airdate: 10/1/2016
The series finale of Mixels, aired coincidentally on Cartoon Network's 24th anniversary. This special highlights both Series 8 and Series 9, the latter of which launched on the same date.
Unlike previous specials, this special focuses on the background Mixels, most notably a young student named Booger. Booger narrates how the city of Mixopolis is a place of creativity and wonder, showcasing how various Mixels use mixing to accomplish various tasks and liven up their life. Mixopolis is his town, and it used to be a fun place to live. Lately the Mixels have been less happy and more reclusive, refusing to mix with each other. The city has also taken on a washed out tone, which the Newzers have noted. The general atmosphere was bleak, but Booger hopes that there is someone out there who would help the Mixels get back on their feet and turn Mixopolis into a thriving community again.
Despite Booger's concerns, it doesn't matter to him that much as he spends his time with his three other friends, Scrud, Blip, and Zabo. They spend their afternoons in their local hideout, reading issues of The Nindja Chronicles. Booger is a big fan of the Nindjas and tries to acknowledge to his friends that they are truly real, but his friends don't believe him. The group of friends soon come across Nixels that have infiltrated the city, not long after their previous defeat. Booger is appalled at how the Nixels are spreading propagnada to spread negativity across the city. A fire starts in a high rise building nearby with a Mixie Cat trapped inside. The MCFD are quick to respond, but they refuse to Max when their fire chief suggests using a cubit to battle the blaze. Booger wishes that the Nindjas would come to save the day instead. His wishes are soon answered with the Nindjas showing up in the flesh to save the Mixie Cat, proving to Booger that they are in fact real. Only he gets to see them however.
The Nindjas wonder why the other Mixels have stopped wanting to mix with each other. Their leader Mysto recalls a previous battle with the Nixels, believing them to be the culprit behind the Mixels' lack of creativity. Elsewhere at the Nixel's current hideout Major Nixel reports about the infiltration's success to the Nixels leader. King Nixel's final plan to defeat the Mixels once and for all is with knockoff cubits known as I-cubits. These phony cubits promote aggression over creativity. With the Mixels caring less on mixing with each other, they are eager to trade in their cubits for the I-cubits. The devices instead nixelized the victim, making them act like zombies. Seeing this effect, Booger convinces his friends not to trade in their cubits for the I-cubits. With all the cubits in the city having been seized by the Nixels except for Booger's Major Nixel expresses concern over Booger's cubit throwing a wrench in their plans, but King Nixel brushes it off by launching the next step in his plan. With the Mixels unable to mix with each other, the Nixels easily overwhelm them and take over the city.
Booger and his friends are some of the few remaining Mixels who haven't been Nixelized, hiding away in dark alleyways. When Scrud comments on the Nixels collecting cubit essence, Booger realizes he has read about them before in an issue of The Nindja Chronicles. He can't recall how the Nixels were defeated previously, as the issue concerning their defeat is a hard-to-find issue. He is able to locate the Nixels' hideout, the I-cubit building, and discusses a plan on how to get inside. At the same time the Nindjas discover the Nixels' plan and rush to their hideout ahead of the kids, but they eventually get overwhelmed by the Nixels even after Maxing.
The Newzers continue to report coverage of the Nixel invasion in exile, hiding away inside Trashoz member Gobbol. They overhear Booger and co. discussing how they are going to infiltrate the I-cubit building by disguising themselve as Nixels. With the kids seemingly the last hope in saving Mixopolis, the Newzers follow them at a distance. While the kids easily make their way past the Nixels, Screeno has his tribe members fly up towards the rooftop. They are able to get inside thanks to a door being left ajar, allowing them to eavesdrop on King Nixel and broadcast his true colors onto a giant screen at Mixopolis Stadium. Coincidentally this is where Major Nixel was heading to in the Cloud Ship, and he begins to notice their plan starting to unravel.
Booger soon reveals himself against King Nixel, who reveals that he has Nixelized the Nindjas. King Nixel plans to load the cubit essence into a missle that will Nixelize the entireity of Planet Mixel. Booger isn't done yet and reveals that he has the last rainbow cubit. The kids soon realize that they are vastly outnumbered with the Nixelized Mixels swarming them. Booger bringsout his trump card in the style of coordinated group dancing, which frees the Nindjas from King Nixel's control. However, the missle is still programmed to launch in a few minutes. Booger manages to sabotage the missle by replacing the I-cubit with the final Rainbow Cubit, but King Nixel manages to trap him inside as it launches. The missle explodes, sending positive cubit essence across the planet. All over the city the Mixels are restored and begin to fight back against the Nixels. King Nixel realizes his greatest plan has failed and tries to escape after the Nixels start showing effects of being mixelized, but gets vaporized by a Slusho and Tungster mix. Major Nixel flees in the Cloud Ship, vowing vengence against the Mixels... after a vacation in Rancho Cucamonga.
With the last of the Nixels being dealt with by the Trashoz, the other Mixels come with the realization that Booger sacrificed himself for the city, but the kid parachutes down to the ground safely, where he is met by the Nindjas. As a gift for saving the city, he is given the rare issue of The Nindja Chronicles that he had always wanted, with an addendum of him fighting against Nixels. Booger ends the series by stating that even one young hero can make a difference, and Mixopolis will always be his town.
This episode provides examples of:
- Art Shift: The Nindjas are first introduced in their comic book, where the art style shifts to a grittier style. The comic itself is averted once the scene shifts to Booger and his friends reading it, with the artwork inside being the same art style as the show.
- Chekhov's Gun: Booger's Rainbow Cubit that he refuses to turn in. Major Nixel does warn King Nixel about how the remaining cubit could sabotage their plans, but King Nixel is none the wiser until Booger reveals it to him during the final confrontation.
- A Day in the Limelight: For Booger, a side character from the previous special.
- Dance Battler: Booger fights King Nixel with "coordinated group dancing".
- Demoted to Extra: Despite highlighting Series 8 and 9, the tribes that contribute to the plot the most are the Newzers and the Nindjas. All the tribes regardless take a backseat in favor of the background Mixels.
- Even the maxes get reduced to only one with the Nindjas Max being the only one shown. The MCFD Max is mentioned, but the tribe members doesn't go through with maxing.
- Taken even further with Lewt, who only appears in the opening, but has a cameo as a photograph. The Trashoz don't even get voice lines.
- Disney Death: Near the end, Booger appears to have died in the rocket, causing everyone to mourn his demise. Mercifully he parachutes down, showing that he lived.
- Engineered Public Confession: King Nixel details his latest plan to Booger on how he would defeat the Mixels. At the same time, Camsta is able to broadcast his speech to Mixopolis Stadium, where the remaining un-Nixelized Mixels find out about the i-Cubit scam.
- Everybody Cries: As above, all the Mixels cry when they think that Booger has been killed in the rocket.
- Fantastic Nuke: King Nixel plans to use a giant rocket filled with reverse-engineered cubit essence to get rid of all color on Planet Mixel, nixelizing the entire population. It even explodes like a aerial nuke.
- Furry Reminder: Spinza slices and dices a Nixelized background Mixel into pieces. It makes a sound resembling falling apart similar to the LEGO adaptation games. This is the closest the show gets to expressing that the Mixels are all made of LEGO bricks.
- Grand Finale: This is the final episode of the series overall.
- Later-Installment Weirdness:
- This is the only episode where the focus character isn't a core tribe member. Booger, the focus character of this episode, lacks a LEGO set.
- One final Art Shift in animation style is done, with the animation being done by Saerom Animation. Noticeably the Mixels logo is more off-looking than in previous episodes where it was done correctly.
- This is the only special without stylized scene transitions of any sort seen in earlier episodes.
- Several mandates about the rules of Mixels are thrown out the window, such as allowing mixes between multiples of the same Mixel or tribe members mixing with background Mixels that lack a LEGO set, and a Max being made when three Mixels regardless of their tribe of origin combine with each other.
- Like the previous episode, Flain is conspiciously absent throughout the entire special.
- This is the only full length episode to not include any murps.
- None of the mixes shown are those that have LEGO Models or instructions online, such as a Mix consisting of several Kraws, or the Slusho/Tungster mix.
- Me's a Crowd: This special shows that multiples of the same Mixel can coexist, and are capable of mixing with themselves, the most notable instance being a football game between teams consisting of multiple Kraws and Krogs. Surgeo has two Scrubz overlooking his medical procedures.
- Paper-Thin Disguise: Booger, Zabo, Scrud and Blip use boxes to disguise themselves as Nixels, even imitating them.
- Sugar Apocalypse: The colorful town of Mixopolis is invaded by Nixels and its inhabitants become zombified.
- Who Writes This Crap?!: Said In-Universe by Screeno, who is disgusted by the sappy lines he has to say on the news. He's the Newzers' Tribe Leader.Screeno: The forecast is bleak. Black and white with scattered grey and possible sepia tones... [Groans] Cut! Who writes this stuff? It’s so grim! Whatever happened to those happy, colorful stories we used to do?
- Your Size May Vary: Booger grows to giant size during the coordinated group dance sequence, but he's back to normal size when he tries to sabotage the missle.
