The background seen in the first area of Doraemon 3, Prehistoric time. In the original game, it didn't scroll vertically, but I expanded the top and bottom to fit SMW's properly-scrolling backgrounds.
Do note that due to this background's palettes using too many swatches, I couldn't use the background palette rows. Instead this uses rows 3-5, which are the palette rows for the second foreground palette, cement blocks, and vines. You can still use green objects as they weren't affected.
If you want to give credit to me for this, you may but you don't have to.