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13-year old Ollie, with the help of his best buddies Cleo and Bernie and monster trainer Captain Wowski, protects and controls a backpack portal to the world of monsters.
40 Episodes
2019
2017
2021
2011
2013
2019
2009
2016
2004
2017
2019
2008
2021
2021
2015
2024
2019
2017
2016
2016