Here is containing the monster list for Godzilla: OMEGA, in their respective stories, no particular order.:
Godzilla:Reawakening/Godzilla: The Atomic Wars
-Godzilla
-Zilla
-Wolfman
-M.O.G.E.R.A
-Double Event (a kaiju created by a friend)
Godzilla X Gormaru
-Godzilla
-Gormaru (a kaiju created by ~Boogie209 (https://www.deviantart.com/boogie209))
-Terrorok (also created by :iconboogie209:)
-Hyo-Jin (cameo)(yet again, created by :iconboogie209:)
Godzilla: The Return of Orochi
-Godzilla
-King Ghidorah
-Orochi
-Utsuno Ikusagami
Godzilla: Attack of Gekuma
-Godzilla
-Amaterasu (created by my brother)
-Ryujin (created by my brother)
-Neo Cerberus (created by me)