after Simon retired from team dai-gurren he settled down with yoko but sadly all good things must come to a end he died at the age of 70 a good age actually.
(the thing with nia dying still happened but he moved on after a few years and married yoko and i know Simon surpassed the anti spirl at the end and became a omnipotent and stuff but that doesn't mean he's immortal).
simon:huh where am I all I can see is white is this what heaven looks like
???:no this is my personal realm child
simon:who are you
???:you can not hear my real name because your ears would explode,you can call me rob or random omnipotent being
simon:not another omnipotent being he said with anime tears
rob:oh I'm not like that anti-spirl guy I'm way more powerful than him and you infact he was only a level 1 omnipotent being I'm level five and you were 1/2
simon:there are levels seriously
rob:yes but thats besides the point I am going to send you back in time
simon:why
rob:I want you to surpass me I haven't had a good fight In a very very long time and I have watched your life and I know you are the only one in your universe that can
simon:why would you think I would be the only one who could surpass you he asked quizzically but kinda already knowing the answer
rob:its because of your RESOLVE!!!
simon grinned
simon: you got that right old man
rob:well I did have this other kid in the universe named Rock Lee but I don't want to be surpassed by someone with big eyebrows
simon raised an eyebrow
simon:i'm gonna want to ask questions about that big eyebrow thing later but since your an level five omnipotent being can't you look at other universe's
rob:yeah but this is a special universe it has the people with the strongest wills like rock Lee,naruto,luffy etc
simon grinned
simon:I really want to meet those guys
rob:you can once you become level 5 it takes a long time though do you accept the challenge
Simon's grin turned vicious
simon:who the hell do you think I am of course I accept
the rob grinned a little bit
rob:but here's the condition i am going to have to erase your memory's but you will have the personality you have right now and you will remember your mission and I made it so you will know when you reach level 5
simon:that's fine I guess anything else
rob:yeah I will reset your spirl powers but you will still know how to control it outside of gurren lagann
Simon:that's bad and good at the same time but I'm always down for a challenge
rob:ok you will go in 3 2 1
Simon saw a bright light and he disappeared
rob:hopefully he will give me a challenge