Blast from the Past

After Mechtavius Destroyer destroyed Bakugan City with his full powers, he goes to New Vestroia to destroy all the Bakugan there, but his plan was interrupted by the Brawlers' bakugan from past seasons. They tried to defeat Mechtavius Destroyer, but they are defeated because of his strong power. Back in the Doom Dimension, Worton tells the Brawlers about the Current of Time, which he discovered by himself when he goes back into time and tells Balista to untell Wiseman the secrets about him in attempt to save his life. After, the Brawlers go into the Current of Time to get out of the Doom Dimension. As the current is about to get very strong, the Brawlers' memories was seen including Betadron who sees the fate of the Nonets when they were crushed by the Mechtavius Destroyer. Also, the Brawlers have seen the destruction of Bakugan City and New Vestroia and seem that he wiil also destroy Vestal, Gundalia and Neathia. After that, Worton and Betadron sacrificed themselves so that the Brawlers go to the Mechtavius Destroyer for the final battle. Successfully getting out of the Doom Dimension, the Brawlers told Mechtavius Destoyer that he will be defeated this time, and the final battle begins!

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S04E45 - Beginning of the End