EvilEngine/BOUL

This asset defines an entry for boulders such as the ones thrown by cannons.

Format: Battle for Bikini Bottom
Boulders are entity assets, so they start with their 0x54 byte header, then are followed by:

Format: The SpongeBob SquarePants Movie - Rise of the Underminer
Boulders are placeable assets, so they start with their 0x50 byte header, then are followed by: