A MonsterVerse kaiju first debuted in Godzilla x Kong: The New Empire.
Shimo is a massive white sauropod kaiju with an ability to release ice beam. She is currently the largest kaiju in MonsterVerse, standing at over 162 meters, making her even taller than Godzilla or King Ghidorah, though her size is usually made less apparent by her preference to walk on all fours.
She was enslaved by Skar King, who uses her as his personal mount in an attempt to overthrow Kong as the ruler of the Hollow Earth Eventually, Shimo was freed and saved by Kong and Godzilla after the duo managed to defeat and kill Skar, and would eventually served as Kong's subordinates in Hollow Earth.