From Worms Knowledge Base
|Standard effects:||Crate contents visible to player|
|Present in:||W:A, WWP|
If a player collects it in a Utility crate, it lasts until the end of the round. Only the player that collects the Crate Spy will benefit and it takes effect immediately when it is collected.
In WWP, the "Everything you wanted to know about the contents of a crate" mode enables Crate Spy for every player for the entire game.
Crate Spy is also present in Worms 2. However, its crate is a weapon crate and will show ??????? (7 question marks) when collected.