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[[File:Great Collision Lore.png|right|thumb|350px|Bakugan emerging from a crater from the Great Collision]]The '''Great Collision''' is a mysterious event that happen twelve years prior to the start of the events of ''[[Bakugan: Battle Planet]]''. This event left various craters around the planet [[Earth (Battle Planet)|Earth]], and, according to [[Veronica Venegas]], disabled all electronic devices in the area during the event. [[Dan Kouzo]] was born on the same day that the Great Collision happened. <ref>''[[Origin of Species Part 1]]''</ref>

While the [[Awesome Ones]] are investigating a crater left by the Great Collision in [[Pinpoint Park]] exactly twelve years after the collision, they witness a second event. This event features many blue lights, and any electronic or mechanical devices are disabled. Piles of goo are found lying in the crater after the event. These piles contained Bakugan, and touching these Bakugan, and by extension, touching someone who is touching a Bakugan, allows the viewing of the [[BakuCore (Battle Planet)|BakuCores]] that affect the Bakugan.

After this event, only children born after the initial Great Collision have the ability to see and properly use the BakuCores that are located in the [[Drome]] while brawling. Adults and anyone born after the Great Collision are still able to brawl with help of implants, but are unable to locate the BakuCores.

It has been suggested by various promotional materials that the Great Collision is possibly a collision between Earth and [[Vestroia (Battle Planet)|Vestroia]].<ref>http://www.bakugan.com/universe</ref>

<gallery widths="120" navigation="true">Great Collision hexagon.png|The symbol seen at the site of the collision twelve years after the original collisionGreat Collision goo.png|The goo pile that contained [[Drago (Battle Planet)|Drago]]Great Collision Dan.png|Dan Kouzo experiencing the BakuCoresGreat Collision Awesome Ones.png|The Awesome Ones experiencing the second event