Another revision!? this fast!?
well, I felt I could still do more with the top screen so...that's it :P. (also changed the theme icon, yay :D).
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both the top and bottom screens are a collection of different sprites and resources from the game. I take (almost) everything from TSR (thanks to all the people who ripped the sprites I used for this theme! more detailed credits down below). The color palette of the buttons is based on the colors of the Japanese logo of the game.
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Credits:

Yoshi sprites by: DogToon64, emi3 and Murphmario. Various enemies by: Bacon and Tonberry2K. 1-3 and 3-6 levels, cristal cave backgrounds and waterfall cave/lava cave backgrounds by: Barack Obama. Standard gradients, cristal cave foreground and intro backgrounds by: MarioFanGamer. Sunbeams by: playgames169vg.
Title screen (night version) (YI:SMA3) by: Jackster.
Baby Mario sprites (YI:SMA3) by: Frario.
Shy guy sprites (YI:SMA3) by: A.J.Nitro.
Sound effects by: Raccoon Sam and Yingchun Soul.
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More things:

-The bottom screen is, once again, changed. This time i replaced the star/flower with the coin.

-The game logo is now the version that appears on the box art of both the snes and gba versions. (but in-game, with the colors of the color restoration Romhack by ShadowOne333 and mangaman3000).

-The yellow shy guy and the nipper/ Walking Piranhas spore were rip by me. there was alredy a yellow shy guy in the "various enemies" sprite sheet but the colors looked odd so i decided to rip the sprite myself (as for the nipper/ Walking Piranhas spore, I couldn't find the sprites anywhere so i rip that one too)

Underground BGM (SMW2:YI) - Koji Kondo