There should be like a scarecrow boss in the advance training centre, where everyone used their weapon to kill it. It'll respawn every 30 seconds after defeating it. His attack will be:
swinging his hand( stick, as it is a scarecrow)
Spawn his "minions"(small scare crows)
The boss itself is just for training use, and for fun too :D
Whats the diference between a scarecrow dummy and the little robots we already have. Details aside, the purpose is the same, test your weapons.