Romhacks
SMW Central
SMW Central is the main website for all of your YI (and SMW) romhacking needs. They host a large library of completed hacks as well as everything you'll need to create your own!
Here is a list of all of the available Yoshi's Island romhacks.
However, there are some other romhacks that are not listed on there, such as the
After you download the desired patch, use the tool below.
Floating IPS
Floating IPS is a tool created by Alcaro that can be used to apply patches to a clean 1.0 (U) ROM of Yoshi's Island, thus allowing you to play any romhack. Direct download. More information.
Steps:
1. Select "Apply Patch".
2. Select the patch that you want to use (IPS or BPS file).
3. Select an unmodified, 1.0 (U) ROM of Yoshi's Island.
4. Click "Save" (or rename the ROM if you want to). Then, open the patched ROM in an emulator and enjoy!