First, use this code

94000130 0000fdff
9229ab5c 0000ffe0
da000000 022ad750
d4000000 ffffffff
d7000000 022ad750
d2000000 00000000
94000130 0000feff
9229ab5c 0000ffe0
da000000 022ad750
d4000000 00000001
d7000000 022ad750
d2000000 00000000
122ad6e8 00000097

it'll transform yourself into a mew. then, go to a dungeon, go to the end, save your game, and open up your game again. now, you can learn every move! save your game again, and put this code in your DS.

94000130 0000fdff
9229ab5c 0000ffe0
da000000 022ad750
d4000000 ffffffff
d7000000 022ad750
d2000000 00000000
94000130 0000feff
9229ab5c 0000ffe0
da000000 022ad750
d4000000 00000001
d7000000 022ad750
d2000000 00000000
xxxxxxxx xxxxxxxx

the xxxxxxxx xxxxxxxx is for entering your pokemon code, for turning back your pokemon into the pokemon previously. and NOTICE THAT THE MOVES THAT WAS LEARNED IN THE MEW FOR DIDN'T CHANGE! VIOLA! and there you have it! any pokemon can learn any move. you can look up the pokemon code code at

http://us.codejunkies.com/search/codes/cheat_codes.aspx?selp=17&game=Pokemon-Mystery -Dungeon--Explorers-of-Time&gameID=17826391&page=0

Hope I helped.