Rock:
Stone Edge is now like Photon Geyser and Shell Side Arm where it's physical or special depending on which attacking stat is higher, and buff the accuracy to 90%.
No longer weak to Ground and Water.
Additional resistances are Bug, Fairy, and Rock.
Ice:
Additional resistances are Dragon, Fairy, Flying, and Ground.
The snow weather condition from Legends Arceus replaces Hail (the speed increase is ignored by Slush Rush.
Frostbite (from Legends Arceus) replaces Freeze
Snow (replacing Hail) increases the Defense stat of Ice-type Pokemon by 50%.
Bug:
Super effective against Electric.*
Immune to Confusion.
Grass:
Resists Fairy
Grass-type Pokemon with non-existent movepools now have actual movepools (and the Chikorita line gets Leech Seed via level up)
Normal:
Immune to Fairy.
Bonus:
Close Combat is nerfed to 90% accuracy.
Scald is nerfed to 70 BP and the Burn chance is now 10% to be in line with Paralysis, Poison, and Frostbite.
*
https://education.nationalgeographic.org/resource/worlds-first-computer-bug