Hello!
And thank you for your response.
It's true that Dolphin doesn't come with any games / applications pre-installed. The only legal way (and the only way that Dolphin developer team supports) to acquire a copy of a game is to "dump" a copy directly from a game disc, either with softmodded Wii game console ( wiibrew.org tells all about that ) or with one of the few PC-DVD-drives that _can_ do it.
The nature of the emulator itself has a lot of gray area, for example downloading a dump of game, that you own. To avoid legal issues, only the methods stated above are supported. Unfortunately that means, that I can not point out a place to obtain legal copy of a full game.
That being said, fortunately Dolphin has a feature called "Fifo player". It saves the emulator output for selected number of frames (I'm not a developer, so can't provide in depth details about it). When I made a Fifo-log of a game that shows the glitches on D3D backend on Intel HD 4600, the glitches are not visible when running the same version of the emulator on another PC with AMD GPU. So this Fifo-log might serve as a "legal game" to show what's wrong (and to know when the problem is fixed, maybe..?). Playing back the fifo-log requires the user to disable Dual-core in the options and then to load the .elf -file normally from the Open... menu. The log is attached as .zip, please decompress it first.
The fifo-recorder seems to cause crashes in the latest builds, but this one I made earlier should provide some useful data and is playable with some of the later builds.
Here's a link https://dl.dropboxusercontent.com/u/23618751/Dolphin4.0.1288_glitch/NSMB_D3D_IHD4600_D4.0-1340.zip
I also tried some of the "HomeBrew" software found at wiibrew.org, but I couldn't find an application that would show the glitches, unfortunately.
Hope I could be of some assistance!
Best regards,
Henrik S.