In a bonus part of my Definitive Super Game Boy Guide, here are the secret credits from the peripheral. The Super Game Boy's credits can only be seen with a secret cheat code: L,L,L,R,R,R,L,L,L,R,R,R,R,R,R,R
Sure, you could type that code in, or watch this video! Interestingly, this credits confirm that Hori were the ones behind the development of the Super Game Boy itself.
All footage was captured using a PAL Super Nintendo Entertainment System, modified to output an NTSC 60Hz signal. While both a PAL and NTSC Super Game Boy are featured in this video, all footage was captured using an NTSC Super Game Boy. The SNES was connected to a XRGB-Mini Framemeister Upscaler unit through RGB SCART cables, all captured through an Elgato HD60 unit.