It has been decided, everyone. Gurren Lagann, of Tengen Toppa Gurren Lagann is the most awesome, best robot of all anime, ever.
Just kidding — this was just the result of one poll (not that I disagree with the results!). Charapedia, a Japanese site about anime and video game characters, held a poll among its members to decide who the deserved the title of "strongest." Apparently the parameters were pretty wide too, allowing for mechs, androids, cyborgs, and any other kind of robot you might think of.
The first spot was, as I said, Gurren Lagann's (a no brainer), followed by Japan's favorite blue, robot cat-thing, Doraemon. Densetsu Kyojin Ideon's Ideon took third, and the rest was a mixture of gundams, eva 01, Arale from Dr. Slump, and Gaogaigar.
But I just can't be satisfied with only one site declaring Gurren Lagann the best. We need our own poll to figure this out. So, fine folks of io9: who is your pick for the strongest anime robot of all time? My vote goes to the winner of Charapedia's poll (surprising!), but only because Johnny Five never made it into an anime. Which is a shame, because he's a true legend.