Mr. Key discovers that he dosen't live in a 2D environment (which all other Overkey shames strangely did) so he ventures around in a 3D environment, this is really just Super Mario 3D World but with Mr. Key, Susan, Completely Innocent Wall and Mr Cyclops Bandit.
All the other modes were dropped too.
- It is considered to be the worst Overkey shame.
- The shame also killed off the series as a whole.
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