The Vexos are a group of people trying to take over all of new vestroia.
Their plan is to take control over everything, the world, and the bakugan!
They came to vestroia and took all the bakugan and forced them to battle for their own pleasure.
But not everyone knows that Bakugan are intelligent creatures so they don't know the harm that is being done by the Vexos.
Now they are creating new Bakugan that are machines!!