- There was once a Club Penguin Rewritten Improvement Project, where penguins could transform into Green Puffles.
- The Party Hat is no longer owned by any regular penguins, as only Sensei, as well as some current and former staff own it.
- You could buddy Rory when he first became a mascot, but he but didn't have a stamp or a background at the time.
- The Rainbow Puffle and Golden Puffle were going to be in-game, but ended up becoming scrapped ideas in the end.
(Updated February 13, 2020)
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