If you're playing on a device like a Wii U or a flash cart, the solution is the same—you need to find the setting that controls the save size and switch it to Flash 128K .
Don't be afraid to make the adventure your own. While the game rewards you for following Ash's story, the freedom to create an alternate path is what makes fan games so special. So, get out there, patch your ROM, master your save management, and enjoy one of the most lovingly crafted tribute games in the Pokémon fandom. The world of Pokémon Ash Gray is waiting for you.