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Billy & Mandy's Big Boogey Adventure is available on HBO Max in the following countries:
Australia
Hong Kong SAR China
Indonesia
Malaysia
Philippines
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Taiwan
When the Boogey Man causes Grim to lose his powers, rank, and title in the Underworld Court for misusing his powers, he plots to seek out Horror's Hand and take over the world. It's up to Billy, Mandy, Irwin, and Grim to get to Horror's Hand before the Boogey Man does.
