- Celebrity Voice Actor: In the original Japanese version, Ryo Katsuji voiced the Earth Sphere Federation Army.
- Fake Russian: Andrei Smirnov is voiced by either Tetsu Shiratori (Japanese) or Brent Miller (USA), neither of whom are Russian.
- Fan Nickname: "InnoRindt" and "Mao" for Descartes Shaman.
- "Realbbons Almark" for E.A. Ray, the guy who talks with Aeolia in the stinger.
- "Dual Core Haro" for the Two-Haro setup used in Gundam Zabanya's cockpit.
- The 00 Qan[T] is known as the "Nu Exia", due to it resembling a fusion of Exia and the Nu Gundam.
- "Naked Qan[T]", due to it shedding its parts and staying "naked" after doing Quantum Burst.
- Jihad-kun, Solid Setsuna, Kira and Set-Light / Setsulight for Setsuna.
- Doubleujah for obvious reasons and Baptismal Boy for Allelujah's name.
- "Vowels", because Tieria's name is full of 'em. Also "Moeria", because his fangirls think he looks adorable when he's upset. Also, mostly on the Japanese Fandom, "Zetsubou-Sensei", especially after the Lampshading Shout-Out in one of the SZS episodes.
- Desu-Yellow for Mileina.
- InnoRindt and Mao for The Earth Sphere Federation Army.
- Team Patrick for Patrick Colasaur.
- Mena Carmine was known as "Nena 2" or "Dr. Nena" until her name was revealed.
- ELS-tan for Amia Lee.
- Upgreyd, a portmanteau of Upgrade and Grey for the ELS.
- The Other Darrin:
- Princess Marina Ismail's original English voice actress, Paula Lindberg, was replaced by Maryke Hendrikse. It's difficult to tell, though.
- Aeolia Schenberg's Japanese voice actor is changed from Chikao Ohtsuka to Tsutomu Isobe, since Aeolia is much younger than he was in his appearances in the original anime. Aeolia's English dub actor Michael Kopsa reprises his role from the original anime.
Trivia / Gundam 00: A Wakening of the Trailblazer