Read this if the game doesn't load.
Enjoy Playing Pokemon FireRed 721 Version (GBA)
I remember stumbling on this wild ROM hack a while back that takes the classic FireRed and cranks it up to eleven by packing in all 721 Pokémon up through Generation VI. Right off the bat you notice the game isn’t just the same old Kanto trek—there are updated sprites, the physical/special split is in full swing, and Fairy-types are shaking up traditional matchups. Trainers you face in Viridian Forest or Cerulean Cave have teams that make you think twice before sending out a starter, so you can’t just coast through with Charizard on day one.
One of the coolest bits is how the hack handles HM moves. Instead of filling your whole roster with Cut-and-Surf-only Pokémon, there’s an expanded TM/HM system and even a key item that lets you manage moves more freely. It really saves you from that classic “I need someone who knows Surf but can also learn Earthquake” headache. Plus, EV training tips and built-in difficulty options mean whether you’re a battle master or a casual collector, you can set things to suit your style.
Beyond the mechanical upgrades, there’s an unexpectedly satisfying sense of discovery. I’ve wandered through familiar routes only to find Gen IV critters lurking behind trees, or random shinies on ledges. The Elite Four has a revamped roster, and gym leaders sometimes throw out totally unexpected type combos, which keeps you on your toes. All in all, Pokémon FireRed 721 is this wonderful blend of nostalgia and fresh surprises that makes you appreciate how far the series has come—and how fun it can still be to revisit those early moments with an expanded toybox.