Talk:Aku/@comment-24053170-20201003064259

While it wasn't able to defeat him or stall him, the Robo-Samurai was proven to be the only non-divine being or object capable of causing some form of harm to Aku.

Since it managed to briefly beat him up and rip off his horns (though it didn't last due to Aku's regeneration, it still is an impressive feat for something that doesn't appear to be divine or spiritual in nature).

The only things ever shown to effect Aku are the Goddess of Water and the Elements, Jacks Sword, and the Scotsman's bagpipes after he was resurrected in spiritual form.