This tool can build the data necessary to flash new games to a Nintendo Power Game Boy cart. The cartridge can store up to seven roms, or a total of 896KB of game data. For flashing, I recommend the GBxCart.

Credits

GB Memory Maker: https://github.com/Infinest/GB-Memory-Binary-Maker
- Without this source, this project would have been much more difficult!
NesDev Forum Thread: http://forums.nesdev.com/viewtopic.php?f=12&t=11453
Pixeltype Font: https://www.dafont.com/pixeltype.font
Early GameBoy Font: https://www.dafont.com/early-gameboy.font
Nokia Cellphone FC Font: https://www.dafont.com/nokia-cellphone.font
Gamer Font: https://www.dafont.com/gamer-2.font
Pokemon Classic Font: https://www.dafont.com/pokemon-classic.font

Ideas

Move more templating into components
Add ability to upload arbitrary 128x8 images for menu entries
Save settings to local storage
A setting to change scrolling ticker text
Upload custom background iamge