The way to find the lil gameboy that plays this is in Lucas' tape. When you go upstairs to the satellite dish, instead of going up the second set if stairs, make your way around the area, it should be on the ground glowing blue
I never knew about the GameBoy 8-Bit tunes until running into Whatever It Takes and this weird little game toy out in the rain. I listened to it countless times and I just love the almost Legend Of Zelda vibes it gave me. This game is such a wonderful gem and I cannot thank it enough for every bit of polish put into it.