This is from a Sega Genesis port of Super Mario Bros. originaly for the NES  aka
(Nintendo Entertainment System)

Super Mario Bros. Overworld Theme Genesis Port

Same as before this is a port of the original Super Mario Bros for the nes

Super Mario Bros. Underground Theme Genesis Port

this is a remix in the sonic hack "Sonic 1 Remastered"

Credit of this rip goes to Master Emerald www.youtube.com/user/wvistaultimate/

Im an artist, not a musician, but i wanna get into doing that, im also willing to take requests for covers, as long as you provide a reference