You can't have a GBA pack without the heavy hitters. These games defined the system's capabilities.
The distribution of ROM files—digital copies of video games—without the express permission of the copyright holder (such as Nintendo) is a violation of copyright law in most jurisdictions. Consequently, there are no official or legally endorsed "full paper" download packs for 50 GBA ROMs. Legal and Safety Risks
: Fast-paced platforming that revitalised the franchise on handheld. Wario Land 4
My Boy! or RetroArch (using the mGBA core) are the most reliable choices.
Is Downloading Retro Video Game ROMs Ever Legal? - How-To Geek