Delta or Folium (available via the App Store in many regions).
: Look for "Revision 1," "Rev 1," or "v1.1" in the ROM metadata or site description.
: Greatly increased shiny odds of 1 in 257 .
Flash 512Kb (crucial for avoiding the "Blue Screen" save error).
In the world of ROM archiving and emulation, numbers like "4997" are not random. They refer to specific release numbers tracking the chronological order of scene releases for a particular console.