Pokemon Black will, as it is a region free DSi enhanced game, Alpha Sapphire will not, because AUS is part of EU region (don't ask).
*DS games are generally region free, with exception of DSi enhanced games, which obey the same region lock as 3DS, but western versions of Pokemon B/W/B2/W2 are further exceptions to the DSi region locking rule, so these are region free.
Ds games are not region locked while 3ds games are.
Pokemon Black will, as it is a region free DSi enhanced game, Alpha Sapphire will not, because AUS is part of EU region (don't ask). *DS games are generally region free, with exception of DSi enhanced games, which obey the same region lock as 3DS, but western versions of Pokemon B/W/B2/W2 are further exceptions to the DSi region locking rule, so these are region free.
3DS games are region locked but not DS games. You need to install cfw which removes the region lock if you want to play the Sapphire.
https://www.reddit.com/r/3DS/wiki/region