From the Super Mario Wiki
The Smithsnorian Museum is the setting of the third episode of Wario: Master of Disguise. A piece of the Wishstone was going to be shipped here on the S.S. Caviar, but Wario stole it, and he and Goodstyle came here to look for clues about the Wishstone. The museum is guarded by Nigel B. Whistlebottoms, who will blow their whistles and summon backup should they catch sight of Wario, but they can be stunned to prevent this. The name is a pun on the Smithsonian Museum located in Washington, D.C. and the word "snore", referencing how Wario thinks museums are boring.
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