Music starting from phase 5 in the Mario Bros Game Boy Advance remake

John Sulu

Goomba
I knew the original Mario Bros came out in 1983, but the version I grew up playing was the GBA remake that was featured in the Super Mario Advance games and Mario & Luigi: Superstar Saga.

So, for the music in the Game Boy Advance remake of Mario Bros starting in phase 5, was this music originally from the original Mario Bros (1983) or Super Mario Bros (1985)?
 
I took a quick listen again, and it's based on the underground theme from Super Mario Bros. (1985).
 
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