This is v1.1 of my program Custom Health Screen MYM Creator. It's a tool I wrote a couple of days ago and just updated which allows you to easily make a .MYM theme which replaces the Health Screen and Press A images. Its fairly straight-forward to use, and if you need any help, refer to the readme. Once you have made the .MYM use MyMenu or ThemeMii to convert it to a .CSM and then use MyMenuify to install it.
**Changelog**
v1.11
-Fixed a typo which stopped program from functioning correctly
v1.1
-Added the option to choose quality of images
-Now replaces ALL regions of Health Screen
v1.0
-Initial release