Bakugan Battle Planet Episode 37

When Bakugan began emerging from the earth's crust in a mysterious worldwide "awakening," Dan and his friends find themselves at the epicenter of a new age. Dan and Company quickly learn that they must grow into more than just suburban kids looking for quick fame in the post-Bakugan era. They must learn how to work with their Bakugan and deploy them in battle in order to survive the seemingly endless forces out to control, enslave or just plain destroy the mysterious race of alien creatures. Dan and his friends will evolve into bona fide heroes by protecting their Bakugan, the Earth and ultimately the incredible secret hidden beneath our feet: Our planet has merged with another, living planet Vestroia.

(Source: Anime News Network)