This patch simply changes the colours of the controller buttons to match the Japanese/PAL versions of the game. This patch has been tested on both North American revisions of Yoshi's Island and should be compatible with some other patches. I've included IPS patches for both headered and unheadered ROMs.

If you are unsure which IPS patch to use, check the size of your ROM. If your ROM is 2,048 KB, use the patch for unheadered ROMs. If it's 2,049 KB, use the patch for headered ROMs.