The Wii, Wii U and Wiiware games uses a tag system that is very useful for several reasons. As an example, Wii's Mario Party 9 is Mario Party 9 [SSQE01] or Mario Party 9 [SSQP01] (the E and P distinguish PAL and NTSC).
My setup is game directory name ended with [code#] and the game names themselves are the code. This format is created by one of the software that creates the wbfs file format for Wii. Probably there are other setups, but highly likely that they all include the code number.
So, there is a chance that most of Dolphin users will benefit from this.
Because the code is part of the directory name, the game is not selected, even though the rest is the same