Soul Crystal is a large patch for the original game.
Physical/Special Split.
Sun and Moon base stats.
Running shoes.
Regional Forms: Corsola-Galar, Sneasel-Hisui, Typhlosion-Hisui, Raichu-Alola and Marowak-Alola.
Mega Evolution: Charizard, Venusaur, Blastoise, Gyarados, Ampharos, Pidgeot, Steelix and Beedrill.
New Evolutions: Mamoswine, Mismagius, Tangrowth, Magmortar, Magnezone, Togekiss, Weavile, Electivire, Phantump-Trevenant, Honchkrow, Farigiraf and Yanmega.
Fairy type.
Infinitely reusable TMs.
Infinitely reusable Fire, Thunder, Water and Leaf Stone (Bill's Grandpa's Event).
Fast text speed.
Move Reminder.
Third trainer card page for Kanto badges.
Revamped Movepools
Bug-Catching Contest every day.
Fourth page with caught data.
Pokedéx reforged and fully completeable.
Shiny rate increased and they are powerful.
More than 50 new moves of new generations.
Tradeback Npc for evolution.
Odd Egg has Pokérus (Goldenrod).
Rebalanced Pokémon.
RTC Changer
Eviolite fully implemented: Also Corsola-Galar, Sneasel-Hisui, Gligar, Porygon2, and Rhydon.
Balance:
Grass immunity to Powder Spore Moves.
Held items upgraded to gen VII.
Dragon Fang Fixed.
Jump Kick Gen 5 Power.
Dig Gen 4 Power.
Blizzard Gen 6 Power and Effect.
Rapid Spin Gen 8 Effect.
HI Jump Kick Gen 5 Power.
Leech Life Gen 7 Power.
Giga Drain Gen 5 Power.
Hidden Power divided by TM in Fire, Ice, Rock and Fighting. Gen 5 Power.
Crabhammer Gen 6 Power and Accuracy.
Future Sight Gen 6 Power and Accuracy.
Disable Gen 5 Accuracy.
Outrage Gen 4 Power.
Waterfall Gen 4 Effect.
Fury Cutter Gen 6 Power.
Fire Spin Gen 5 Power and Accuracy.
Glare Gen 6 Accuracy.
Sandstorm Gen 4 Effect.
Fly Gen 4 Power.
Improved AI and Leaders.
Battle weather icons.
Polkadot Bow added.
Mega Stone added (winning the bug contest). Usable in Tradeback Npc.
Persianite: Rise Persian critical to Gen 1 (held).
Zafari Stone: Rise Tauros critical to Gen 1 (held).
Azumarill has Huge Power.
Trap Effect upgraded to Gen 5.
Evasion Moves removed.
Reduce Accuracy Moves removed.
Attract removed.
Shiny Stone.
Dusk Stone.
Hisui Stone.
Alola Stone.
Magmarizer.
Butterfree has Compound Eyes ability.
Hypno, Ariados and Noctowl has Insomnia ability.Original bugs and glitches fixed:
Fast 1024 stat.
Perish Song .
Spikes fixed.
Secondary effect moves does not work in the 1/256 of case.
Belly Drum.