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they changed the wall puzzles, you can't just use an escape rope for free items anymore. you're given a riddle in unown and have to input text to solve, but you're limited to whatever unown are currently unlocked, so I can't solve the first one which I'm pretty sure is palkia because I don't have access to L. I also am not sure how you get more because I've checked the two I have access two and I seem to get more randomly, I didn't have the ! unown before making this post