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Gary's Mad Scientist Giveaway is a background in Club Penguin Rewritten. It could be obtained by meeting Gary the Gadget Guy.
- It is Gary's fifth background.
- It is Gary's first custom background.
- It is Gary's first animated background.
- It is animated to have the look of a film reel, reminiscent of the Night of the Living Sled series.
- It takes place in the Secret Laboratory.
- It replaced the Salty Dog Outfit's original ID of 24218.
- It was inspired by a background created by community member Babycrier.