For a copy of CollisionShape2d, change the size of the copy and the original will change as well

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:bust_in_silhouette: Asked By myhalibobo
:bust_in_silhouette: Reply From: kidscancode

That’s correct. A CollisionShape2D’s shape is a Resource and resources are shared between copies. If you want the shape of the second one to be unique, you can either click on the node’s “Make Sub-Resources Unique” button in the Inspector or manually add a new shape, either via the editor or in code.