Beginning of the End is the 45th episode of Bakugan: Mechtanium Surge. It aired on January 7, 2012.
With help from Worton and Betadron, the Brawlers travel back in time to stop Mechtavius Destroyer from destroying Bakugan City and New Vestroia. Mira and Julie decide to go help them out, but Runo stays behind to send the Battle Suits to the Brawlers. The Brawlers use Bakugan Combinations to counter Mechtavius Destroyer, but are easily defeated. Shun and Marucho summon Flytris and Thorak for help, while Dan summons Dragonoid Destroyer. However, Dragonoid Destroyer only fights at 90% of his energy, stating that "not everyone is here yet". Mechtavius Destroyer then uses his powers to destroy Volcano Island, the location that had once been the hideout for the now-disbanded Nonets. Gunz considers giving Reptak to Dan due to his lack of knowledge of Bakugan Combinations, Battle Suits, Mechtogan, and Mechtogan Destroyers, but Reptak firmly states that they are partners 'til the end. Mechtavius Destroyer then fires a strong blast at Gunz and Reptak, but at that same moment, Reptak spawns a Mechtogan: Chromopod! Dragonoid Destroyer then announces that everyone is here.
- Fusion Dragonoid
- Betadron (flashback)
- Worton (flashback)
Battle Suits Seen
Mechtogan Destroyers Seen
- A deleted scene appeared in the Hong Kong Version where Julie told to the Cameraman to give her the camera, but he refuse and he said that he will go together.