After about 4 months of experimenting with Sega Genesis colors, here's my first "Good" attempt on 16-bit sprites. Originally, I wanted to use these sprites for some custom "Super Mario Bros. X" levels. And i was like, "Why not use the 'Super Mario Bros. 2 USA' Mario sprites, since mostly everyone in the smbx community is using SMB3 graphics & styles?" and so I did. So I might try to experiment with these sprites in SMBX to see if they fit in. If so, feel free to use them in Super Mario Bros. X! ^^
Special thanks: Enjl (Of the SMBX community), for the bit of help on the palette of "Sega Genesis" Mario.