Pokemon Mystery Dungeon Explorers Of Sky Answers for Nintendo DS

The code doesn't work!?

Hello, i put the code in the wonder mail S section of my japanese version pokemon mystery dungeon explorers of the sky, i'm having trouble and i suspect it's because of the version i'm using, if someone could help me find a japanese code for golden mask and secret slab i would be thankful, also i'm from Spain so yeah, i actually got the game in japanese by mistake even tho i completed it mainly by deduction xD