Source
Though they'll never meet, here's the size comparison of Demon Core Goji and Skull Island, USA Kong
Rougher than the rest of them
And the smart one
Eggman
All hail
I did a thing
One more shadow
Pac-Man Everyone always does space suit so why not deep sea horrors?
Ultraman
King of the Monsters
The most common of riders
Godzilla: Demon Core Season 2 Gojira design update!
After the 3 Dorats merge together, they become the terrifying Ghidorah