Abbadon is a bat-like kaiju who briefly appears in Godzilla: King of the Monsters as a name on a map displaying kaiju locations around the globe. He hibernated in Devil's Tower, Wyoming until King Ghidora called all kaiju to join his cause. The name of his hiding place is appropriate; Abbadon means "angel of death" in Hebrew.
Abbadon is basically a gigantic red bat with a little bit of gargoyle mixed in. One of his most notable features is his tail, which is spear tipped, similar to that of dragons in some medieval drawings. He is 72 ft tall (roughly 122 ft with tail), and his wingspan is upwards of 800 ft.
Abbadon's main form of attack is swooping down on his enemy and jabbing them with his razor-sharp talons, but he has a few other tricks up his sleeve. One of these is his toxic saliva, which he can spit and use to burn his target. Although he is completely blind, Abbadon is constantly aware of his surroundings through his incredible sonar, allowing him to effortlessly dodge attacks and making him one of the most agile airborne kaiju.