Monsuno are creatures that were delivered to Earth via meteors millions of years ago, and are the creatures the Monsuno show is based around.
The way Controllers release their Monsuno is to spin it out of their hand and the Core will hit the other person's Core or object, which will make the Monsuno come out of their Core.
They can only leave their Cores for eight minutes. By telling their Monsuno to "Return" they will go back into their Core.
