“KOF” is short for “The King of Fighters“, a popular series of fighting games developed by SNK (Shin Nihon Kikaku) that first debuted in 1994.
“Mugen” is a term commonly used to refer to fan-made, custom versions of fighting games that feature a large roster of characters from various franchises. Mugen games are created using a free, open-source engine and can be customized by the users themselves.
“WF” is an abbreviation for World Heroes, a series of fighting games developed by ADK that debuted in 1992.
“Orochi Iori” is a character from “The King of Fighters” series, who is known for his wild, sadistic, and power-hungry personality.
“Dreamform Sula” is not a commonly known term or character and I couldn’t find any information about it. It is possible that this is a custom or fan-made character for a Mugen game.
“The King of Fighters (KOF)” series is a long-running and highly regarded fighting game franchise developed by SNK.
The series is known for its fast-paced and intense gameplay, as well as its large roster of characters from various SNK franchises, such as Fatal Fury and Art of Fighting. KOF has been released on multiple platforms, including arcade machines, home consoles, and handheld devices.