Because the GBA is discontinued and out of print, and Nintendo no longer sells new copies of WarioWare, Inc.: Mega Microgame$! , many archivists argue that downloading a complete set is a form of digital preservation. However, note that Nintendo currently sells GBA games via Nintendo Switch Online (subscription), which complicates this argument.
Here are some of the best GBA ROM packs available, featuring a comprehensive collection of games that you can add to your gaming library: all gba rom pack