Decoy

The Decoy is a non-canonical Wonder Weapon that is confirmed to appear in the Spacefront storyline.

The only things known about the decoy is that it replaces the Monkey Bombs and the Gersch Device. It takes up the secondary grenade slot. The Decoy can only be obtained from the Mystery Box.

Trivia

 * Unlike the Decoy in multiplayer, the Nazi Zombies variant of the Decoy does not move around. It does create the same noise, however.