From the Super Mario Wiki, the Mario encyclopedia
The ON/OFF Trampoline is an object in Super Mario Maker 2 added in the April 22, 2020 update, only available in the Super Mario 3D World style. It is a type of Mushroom Trampoline that can be activated and deactivated by hitting an ON/OFF Switch. When inactive, it is gray and solid. When activated, it is pink with blue spots and works the same as a regular Mushroom Trampoline.
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