I found the secret ally~, had to cheese a bit to do so, cause OMG THEY'RE SO DIFFICULT TO FIGHT, EVEN WITH SAID CHEESE, guilmon kept getting ko'd for some reason, but revived alot, which I did notice my MP was gone in that section, which I found weird (max being 0 MP), other than that I do want to say that I LOVE the future quest they'll have~, trying not to say much due to spoilers but ye love the idea you got for em~~~.
Edit: It may be difficult, yes, but I feel like I was meant to go there at a much later level, which I didn't do, so... yeah difficult