I have a NTSC-J console with D2Ckey and firmware 3.1J, could someone kindly let me know on games that will not brick my system. I realize there is a compatibility list on sticky but it seems like it's for Wiikey, hope you could lend a hand.
The compatibility list is for playing patched games of a different region than that of your Wii. If you have a D2CKey, and up-to-date firmware, you should be able to download and burn ISO's without bricking your system, as long as they are of NTSC-J format.
From the D2CKey official website:
Super Mario Galaxy + D2CKey = True! - 2007-10-29
Various sites are reporting that backups of Super Mario Galaxy are working with D2CKey, but not with any other modchips! We have tested a backup of the USA version of SMG and can confirm that it does in fact work on the USA NTSC Wii with D2CKey. The USA version of SMG will not work on other region consoles, but we are confident that backups of other region versions of the game will work on other region consoles. We will post more news about this as soon as we can obtain original game discs from the other regions to test.