OK K.O.! Let's Be Heroes!: K.O.'s Final Battle

Four months before, K.O. believed that he had stopped the threat of Turbo K.O. once and for all. But things have only gotten worse.
Professor Venomous is now on the rise. Countless robot attacks. An element unknown to this world. And K.O. with the power to save the whole world is struggling to keep his evil alter ego at bay. Can he do it, or will he let down the entire world, as Venomous grows in power with every passing second?