So beating Hard past 30 doesn't retroactively unlock normal and easy? Oh that's fucking bullshit. The mode is straight up torture.
Welp, default colors for me. Thanks for locking colors behind a boring treadmill.
I use it as a way to kill some time while waiting for online matches, personally. I'll also quote myself from the last page just in case anyone needs a little help with it:
OVDRobo said:Tip for anyone trying to unlock the costumes: Activate fight request with the 'battle confirmation' option set to 'ask'. If you're doing badly in a fight, you can hit start and enter the online battle. After fighting the online battle, you'll be returned to the start of the fight with your health and meter as they were when you started previously. Basically a way of cheesing continues out of survival mode.
Unfortunately, there's no way of forcing yourself to be matched with someone else, so sometimes you'll not be able to use this method due to matchmaking. Pausing also pauses matchmaking, too, so you can't just wait it out that way.