Super Mario 3D land ghost


I've been playing super mario 3D land with my little brother this week,
We've finished the game a while ago and decided to find some easter eggs.
After seeing the world 4-4 ghost that appears behind the fence, we got curious and
also went to the other ghost houses to check out the fence.
It also appeared in all the other ghost houses in the game!

Has anyone else seen it in the other ghost houses too, because I read online that this
easter egg only occurs in world 4-4.
And what is this figure even doing in the ghost houses anyway??

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