This is the IPS patch of Pokemon Sienna Beta 3. You will need to extract the contents of this file and use Lunar IPS to apply Pokemon Sienna Betta 3.ips to a clean Pokemon - Fire Red.gba rom. I did not make this. You can find the source...
I didn't know they made an MSU cart for the Genesis.... I knew about the SNES one and the library for that is rather large but the Genesis one has very few games