How do you get a moonstone in Pokemon explorers of time?

this may not be the best answer but...

once you beat the game try going into some tough dungeons or ones that you haven't explored yet, p.s. do NOT go into zero isle. anyway, search around and you might be able to find kecleon selling some precious stones. i went to blizzard island after i beat the game to find scizor, and found kecleon selling a moon stone and some lighting stones and some other stones to help you evolve as well. the stones are $1000 each so make sure you have lots of money.