Made in BizHawk 2.10-rc1 ( https://github.com/TASEmulators/BizHawk/releases/tag/2.10-rc1 ) using SameBoy core with GBA BIOS.
Download homebrew here: https://github.com/Mico27/SuperMarioBrosMini/releases/tag/2.0.7
If you want to open the game in GB Studio, you need version 4.2.0, which is currently in development: https://github.com/chrismaltby/gb-studio.git