If you've got TWiLight Menu++ then you've already got GBARunner2, it's bundled in with TWiLight (along with several other emulators). Simply put the .gba files on your SD card and load them from TWiLight.Ok I am up and running and fixed my error has occured issue, just added some games to my sd card
How to I install GBARUnner2 (hypervisor)
I am here, but no download? and what to move to sd card?
https://github.com/Gericom/GBARunner2
To download from GitHub you need to click the "Releases" link on the righthand side then for DSi you'll want the
GBARunner2_arm7dldi_dsi.nds
file. Shouldn't need to do that though since it's already included with TWiLight.