Alternate History: As detailed in Parallel Works #5, the main differences start during the American War of Independence (also name Washington Rebellion as a continuity nod to Code Geass) Benedict Arnold (and Benjamin Franklin) remain loyal to the independence movement and the slaves are freed to fight against the British, and the United States earns their independence with much more favorable terms. And Britannia emerges after a coalition of European countries defeated Napoleon.
Minor in the grand scheme of things, but Nia joined the Dai-Gurren Brigade without Kamina dying.
The Autobots and Decepticons awakened Adam and may have accidentally caused Second Impact. (Albeit Megatron was the one who accidentally awakened Adam.)
And I Must Scream: Deathwing is angry because he was caught in the Second Impact and trapped inside the Earth, while being forced to hear Barney's theme song during his confinement.
When he almost died, Shinji was briefly forced to listen to the city and the other rangers fall to the Zilla Pack
Curb-Stomp Battle: The entire second-half of the Deathwing crisis (which eventually culminates with MechaBreakerLordtearing the Dragon's humanoid form apart...AFTER HE BARELY SURVIVES A GIGA DRILL BREAKER!)
( Blackout vs Eva Unit 03 and an entire US army base armed with tanks and mobile suits, guess who wins?)
Britannia-backed Germany (lead by the Baroness and Dilandau) against Luxembourg. Then they discover that Luxembourg has a Planet Buster. It doesn't work.
Lagann and the Homodrone 01 versus two Jet Alone robots...really guess!
Decepticon Blackjack vs Autobot? Ultranus
What does Yugi do when he first meets Spacegodzilla? Mindcrush it of course!
Early-Installment Weirdness: The first five chapters of the story are very different in tone and writing style when compared to the rest of the story. This especially noteworthy in Chapters 1 through 3 that have more emphasis on comedy than action.
Kaiba loves to tick off the rangers, defense force and Mokuba.
Rossiu is the favorite punching bag for Simon and Kamina.
Shinji against almost every monster that the ranger have fought and even punches out a reporter...given that she was asking for it.
Kirk Summation: Aina to Misato shortly after the latter lays a Motive Rant on Hikari, showing WHY Misato's justifications simply are NOT enough to cover what Shinji's gone through because of Gendo. Misato appears seemingly unfazed, but the author has indicated the may be further ramifications of the incident to come.
Large Ham: Lots, due to the nature of the fic, but Deathwing excels everyone.
In the battle against Cyclopisis, everyone, even more stoic characters like Roger and Heero turns into hammy hotbloodeds.
Let's Get Dangerous: Consider this the subtitle of Chapter 22. Shinji, Hitomi, Bit and Yugi are all shining examples as to why.