Great walkthrough, but I don't think that "x" and "o" are the best choice of characters. It would be more readable if you used ░░ and ██ in my opinion (if 3dspedia supports these, but I think it does). It would give this for Zygarde for example.
░░ ░░ ██ ░░ ██ | ░░ ░░ ██ ██ ░░ | ██ ░░ ░░ ░░ ██ | ██ ░░ ██ ░░ ██
░░ ██ ██ ░░ ██ | ██ ██ ░░ ██ ░░ | ░░ ██ ░░ ░░ ░░ | ██ ░░ ██ ░░ ██
░░ ██ ██ ██ ░░ | ██ ░░ ░░ ██ ██ | ░░ ██ ██ ░░ ░░ | ██ ░░ ██ ██ ░░
░░ ██ ██ ██ ░░ | ██ ░░ ██ ██ ██ | ░░ ░░ ░░ ██ ██ | ██ ░░ ██ ░░ ░░
░░ ██ ██ ██ ██ | ░░ ██ ██ ██ ██ | ░░ ░░ ░░ ░░ ░░ | ██ ░░ ██ ░░ ░░
░░ ██ ██ ██ ██ | ░░ ██ ██ ██ ██ | ░░ ░░ ░░ ░░ ░░ | ██ ░░ ██ ░░ ░░
░░ ██ ██ ██ ██ | ██ ░░ ██ ██ ░░ | ██ ░░ ░░ ░░ ██ | ░░ ██ ░░ ░░ ░░
░░ ██ ██ ██ ░░ | ██ ░░ ██ ██ ░░ | ░░ ██ ░░ ░░ ██ | ░░ ██ ░░ ░░ ██
░░ ░░ ██ ██ ░░ | ░░ ██ ░░ ██ ██ | ░░ ██ ██ ██ ██ | ░░ ██ ░░ ░░ ██
░░ ░░ ██ ██ ██ | ░░ ██ ░░ ██ ░░ | ██ ██ ░░ ░░ ██ | ░░ ██ ░░ ░░ ██
░░ ░░ ░░ ██ ██ | ░░ ░░ ██ ░░ ██ | ░░ ░░ ██ ██ ░░ | ██ ░░ ░░ ██ ░░
░░ ░░ ██ ██ ██ | ██ ░░ ██ ░░ ██ | ██ ██ ░░ ██ ░░ | ██ ░░ ██ ░░ ░░
░░ ░░ ██ ██ ██ | ██ ░░ ░░ ██ ██ | ██ ██ ██ ██ ██ | ░░ ██ ░░ ██ ░░
░░ ██ ██ ░░ ██ | ██ ██ ░░ ██ ░░ | ██ ██ ██ ██ ██ | ██ ░░ ██ ░░ ░░
░░ ██ ██ ░░ ░░ | ░░ ██ ██ ██ ░░ | ░░ ░░ ░░ ██ ██ | ██ ██ ░░ ░░ ░░