The Key to Executive Washroom is an item in Pajama Sam 2: Thunder and Lightning Aren't So Frightening. This only happens in debug mode, that whenever Sam uses it on the door, the angry pen won't say, "Go away!" anymore.
Pajama Sam 2: Thunder and Lightning Aren't So Frightening[]
Sam can't use it until he becomes a Member of the Board and he'll need to answer some questions to do that!