Avalon and Cure

I recall there being a way to get cure for Avalon during the train sequence, but I can't recall how. I haven't played since 1.6 so my memory is very fuzzy on this. Has it been removed?

There's a thing on top of one of the train carts, before the train gets split in half where you can't go back, just walk on top of the train cart and you'll fall through a thing and then need to head back to the caboose and find a treasure, that for some odd reason teaches Avalon Cure.

Yes! That's right. I went beyond there, but it's worth restarting for. I'm burning so much money on Pizzas that I'm unable to afford anything else. Thanks!