Series finale time!
Poor Komori's stuck in the Councilor Troi position... standing around the bridge doing Not Much and occasionally being asked if she can sense something.
Xavier's arguing with Challia that Kycilia HAS TO survive because if she dies and Zeon collapses, Newtypes will die out. Challia, for his part, is now Mr. Democracy? I feel like this fight would be a lot more visually interesting if it weren't just twirling against a blank background. Xavier almost lands a hit on Challia, and then gets REKT at the last second.
So we've got a multi-gambit pileup in the last episode...
Shuji's here from The Other Side to clean house and apparently Destroy The Universe. Char's here to banish First!Lalah back to the main UC universe. Kycilia's been shot in the arse and maybe wants to destroy Earth. Char claims HE had Yomagn'tho built specfically to send First!Lalah back to her own universe.
Shuji out here saying what everyone was thinking at the end of the last episode...
"The real Gundam has appeared..."
We get some clarity on the whole Lalah situation... and it seems I was right about what she's been doing.
Rose of Sharon Lalah is from a timeline where Char, not Lalah, died fighting Amuro Ray's Gundam. Her despair triggered a zeknova within the Elmeth's Alpha Psycommu, flinging her back in time and space and creating an alternate universe. She's been using the Alpha psycommu to Zero Escape herself repeatedly to create diverging alternate timelines in a bid to create a universe where Char doesn't die. She has failed every time, as in every universe Char dies fighting the White Gundam.
We get to see some of Char's custom machines from those alternate timelines including a Gouf, a Zudah, a Bigro, a Big Zam, a Galbaldy Beta, and a machine I don't recognize that looks vaguely like a Kampfer?
Every time she fails, her despair causes the universe she created to collapse. Having finally hit on a winning combination by having Char become the Gundam's pilot, Shuji believes she'll fall into despair now that Char is REJECTING the world she's created and that it will be so traumatic for her that it'll take both this world and The Other Side down. Shuji's goal is to save one reality by killing Lalah and sacrificing the GQuuuuuuX universe. Shuji's apparently been doing this more times than he can count, coming in at the end of the universe to kill Lalah and start the cycle over.
Finally - FINALLY - we got some character development for Shuji and you have to feel for the poor guy.
Being Death, the literal Destroyer of Worlds, has to suuuuuuuck... especially since he has to watch the same girl get her heart broken over and over and then kill her in the depths of her despair.
Kycilia gets a fresh helping of despair, flashing back to her youth and her apparent attraction to young Char. She's lamenting the potential loss of the world she was going to create for Newtypes before Challia Bull takes a whack at assassinating her, and then Char recreates his infamous First Gundam assassination of her from the Red Gundam.
All that's before the station break!
So now Machu and Shuji are squaring off over Lalah. Nyan intervenes. Now Nyan and Machu are teaming up on Shuji. That Shuji's holding his own against two much newer MS's with this timeline's equivalent of the Intention Automatic system using an RX-78 is pretty impressive.
Challia's endgame is apparently to put Artesia on the throne in Zeon, so he attacks Char. He seems to have had visions of this universe's equivalent of Char's Counterattack, noting that Char would one day turn on Earth the same way Kycilia did.
Shuji... turns the RX-78 into a kaiju? It just swells up until it's big enough to comfortably grab the GFreD and GQuuuuuuX in its hands, and seems to be beam-proof now. It swats the other Gundams around a bit and then crushes the GFreD to bits. The GQuuuuuuX goes full Evangelion and develops a mouth as its psycommu goes into overdrie and she blocks Shuji's attack. Lalah wakes up while Machu is using Talk no Jutsu on Shuji. We get a very forced conclusion to the Machu/Shuji ship.
We learn that the GQuuuuuuX's Omega Psycommu includes tech from the other side, like the Rose of Sharon. Apparently it's called the Endymion Unit? Machu's screaming monster Evangelion of a Gundam beheads Shuji's giant RX-78 and then Lalah creates a massive zeknova that destroys Yomagn'tho.
Shuji and Lalah have seemingly vanished from the face of the universe in a zeknova. Machu is crying it out in orbital space with Nyan. Challia and Char part ways, with Char flying off in the Gundam's Core Fighter and Challia's escape pod being rescued by Xavier. Artesia takes over Zeon. Char finds this universe's Lalah living on Earth. The Pomeranians are shown aboard whatever ship they fled Side 6 in. Apparently they've founda a new machine for Clan Battle (Looks to be a Zock?) Machu finally bothers to text her mother from a beach on Earth with Nyan.
All in all, a mad rush of a resolution like most of us expected. Probably still the best episode of the series, and certainly the most action-packed. It has a lot of unexplained buzzwords and arse-pulls, but with just twelve episodes that was always going to be the case.
I wouldn't call it great... with a different writer and more runtime it probably would've been. They left a lot of interesting plot threads on the table to push what was essentially filler.