Pokemon and Adventure

Pokémon and Adventure

All 151 Pokémon are obtainable in ordinary, unrandomized play, allowing a living Pokédex.
Updated base stats using later games, including separate Special Attack and Special Defense.
Updated the EXP awarded for defeating Pokémon using Generation VIII values.
Increased catch rates for Dragonair (27 → 45), Dragonite (9 → 45), and Raticate (90 → 127).
Reworked level-up moves using Let's Go, Pikachu! as a basis, adapted to the moves available here.
Pokémon can learn moves on evolution and multiple moves at one level. Gaining several levels at once offers moves from every gained level.
Expanded level-one move lists for the Move Relearner.
Updated all TM compatibility lists to Generation VII.
Added Pokémon genders and shiny Pokémon, with normal shiny odds of 1 in 8,192.
Every species has its own normal and shiny colors.
Starter Pikachu has maximum natural stats (DVs) and the boosted base stats of Partner Pikachu from Let's Go: 45 HP / 80 Attack / 50 Defense / 75 Special Attack / 60 Special Defense / 120 Speed.
Ordinary wild and opposing Pikachu keep their regular base stats. Wild Pikachu can evolve; it is no longer treated as the starter.

Reworked species and levels throughout Kanto, drawing on Red, Blue, and Yellow for more variety.
Expanded walking encounters to 12 possible entries per area, up from 10.
Wild levels vary around the area's usual level, by up to 7 levels either way; low-level encounters have a smaller effective range.
Adjusted early Route 1 and Route 22 encounters.
Improved Pokédex habitat information, including Cerulean Cave.

Rebuilt trainer teams throughout the adventure for a harder game, including in Classic mode.
Pokémon on the same team can have different levels.
Gym Leaders, the Elite Four, and the final rival have custom movesets.
Added individual trainer names and updated class names, with Let's Go and anime references. Jessie and James have their own class.
Trainer Pokémon have more varied natural stats, and selected opponents are shiny.
A.J. has his Sandshrew again, and selected Gym Leaders use legendary Pokémon.
The first Champion battle reaches approximately level 85.
After becoming Champion, challenge the Gym Leaders again in badge order, with new dialogue and teams. Complete that round before returning to the League.
The Elite Four and Champion have stronger rematch teams; the Champion's reach level 130.
Giovanni's rematch team is level 94–99, including shiny Kangaskhan. Lance's Dragonite is shiny in both battles.

Event spoilers below. Nuzlocke restrictions still apply to gifts and extra rewards.

Mew under the truck: push the Vermilion dock truck left with Strength to reveal level 50 Mew, complete with a dust animation.
The Magikarp sold near Mt. Moon is shiny and level 15. Scripted shiny gifts can have different genders where the species allows it.
In Classic, take both Mt. Moon fossils and both Fighting Dojo Pokémon.
Gift levels: Bulbasaur, Charmander, and Squirtle 10; Eevee 30; Lapras 40; revived fossils 30.
Legendary bird levels: Articuno 60, Zapdos 65, Moltres 70.
Receive five Poké Balls along with the Pokédex.
Viridian's catching demonstration features Grandpa trying—and failing—to catch a level 255 Mew. He then takes you into the school, where the teacher gives you the Type Chart. The lesson and gift happen once.

The Pokémon on the left is the one you give away.

Added a PC at Day Care, which also accepts Pokémon that know HM moves.
Added front walls to the Celadon Mart and Mansion rooftops.
Corrected the north–south Underground Path's size, Route 2 gate-exit tiles, a Viridian Cut tree, and the Route 16 sign interaction.
Added post-Champion dialogue and the League guard for Gym rematch progression.