Hull Blox are blox that change their skin depending on the theme, added in Boom Blox Bash Party. They act just like immobile blox, but can be destroyed in 3 hits. But the catch is that after a certain amount of these blox are destroyed, the remaining blox will become mobile.
This is considered by few people to be a bug, but it is NOT a bug. It is a feature for the Hull blox to make it more unique. As said: the Hull Blox will have a different skin depending what level you place it in. In Explore, it will look like a Wooden Blox with dark parts on it. In other levels, they look like Blox with small rectange drawings on them.
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