Dont get me wrong,I think Odin takes this as well, but seriously, TTGL is bigger than a galaxy. Tell me, why do you think the creators would have it any other way?Then they should have tried to depict it with a little more clarity.
What was depicted(I'm not pulling this out of nowhere) doesn't support the concept of it being a galaxy or multi galaxy sized robot. To even be moving at the pace it was going would require tremendously FTL movement.
@Hellos: Dude, it's Gurren Lagann. This is a series where they break the laws of physics, science, and reality on an almost episodic basis. Logic cannot be applied to it. One can only marvel at it's ridiculous, over the top Awesomeness.Then there really wouldn't be much of a point of involving the series in any kind of debate whatsoever.
Honestly, unless there is a lightning rod of evidence that I missed watching said fight, I'm going to find it nigh impossible to say with certainty that said mech is galaxy sized, based off what I already pointed out.