Cap Gun

The Cap Gun is a weapon that looks identical to the Dart Gun, but behaves differently. It kills anything in one shot, even if they possess the Invincible adjective or is otherwise unable to be killed or removed, with the sole exception of Lily at Edwin's Farm.

The projectiles that the Cap Gun fires are particularly strange. When opened up in the object editor, it is revealed that they aren't any object at all, which doesn't make any sense.