Not sure if anyone has made it to this point even, but where do you go at 297? 175, 192 and 203 are invisible to me still even though I did all of the memories, 230-237 require clearing all of the EX battles, 297 requires 336 which requires 314 which requires one EX battle clear which requires 298 and 344, which, you guessed it, require 297 and 314. Guess I'll just start wandering around if it's not gonna give me any more tips, I've cleared everything possible and everything else is locked by doing something that it itself locks.
by the way, I haven't tried it out yet but apparently clearing the 4th memory hbattle (took me 5 hours and it's 68 rounds of suffering, good luck) gave me a toggle item that saves it permanently resurrects me on death.
ok, I see how to progress now. I absolutely don't like it, and think this developer is a dick for doing this, but I see it. You need to go back to every single hbattle chain in the game and clear all the scenes after the "progression" clear, this is called an EX battle in the game.