Yes, 1 hour long video. I didn’t do all 50 rounds in one sitting though, you get a checkpoint each 10 rounds.
This was not easy at LV1. The hardest parts are the Leon and Cloud fight (and yes I know I played horribly there), and the rounds with Invisibles and Angel Stars. Just keep in mind you’ll have to use Elixirs in the last 10 rounds.
For anything else, Blizzaga and Gravira/ga spam is usually the way to go. It would have helped if I had Zantetsuken but I did this before Kurt Zisa. I’d recommend instead you beat him and Phantom at LV1. At least I beat Phantom already in this file so I had Stopga.
Hades is a pretty cool fight, I didn’t no damage it just because I had 9 rounds to do before, but I no damaged the last round against Rock Titan because it’s a joke fight.
And yes this is required if you want to unlock the secret ending on Proud.
source