on the website it says theres dragons, the command doesn't work though

/mmob spawn cyandragon not sure if i need an update or what

What command are you trying to use and what are you expecting to happen?

Do you have LibsDisguises installed? It is required for dragons.

oh I forgot to do that sorry

does it automaticly add the dragons or do i need to add anything, and can it be any version

You will need to add the spawnmobs example /mexample add spawnmobs if you want them (and other magic mobs) to spawn naturally. But once you have LibsDisguises you should be able to spawn them with the mmob command.