The Fairly Oddparents: This episode is called "Escape from Unwish Island."
"Unwish Island serves as a unique and imaginative setting where Timmy's rejected wishes come to life. It is crucial to the plot because it represents the consequences of Timmy's past desires. The island is filled with whimsical yet dangerous characters that challenge Timmy."

Fairy World Giant Unwished Storage is the location where unwanted wishes are sent. All wishes that a fairy godchild wishes away are placed in a storage locker with the godchild's name on it

Note the names on the lockers:

https://www.youtube.com/watch?v=fpTRPsyAiz0