I know, I just wanted to take it to the Elite Four with me. It's always been my thing, to take the cover Pokemon with me to the Hall of Fame, since I started in Crystal.I'll leave it to other suggestions on whether to keep that, but a suggestion if you continue.
You can KO Kyogre and battle it after the Elite Four to SR it without the cutscene.
I decided to keep it. I only ever really battle my brother and my two friends, and I'm by far the most competitive out of all of us when it comes to Pokemon. And I don't plan on trading it off.Go for the better HP, I have tossed so many Reshirams because of the HP IV :'(
However if you just like to play for fun then keep it, but it probably won't see much value if you plan on trading it.
Thanks for the input, people. Definitely doing the KO/Elite Four thing for any other legends with cut scenes.