Like the previous games in the series, there are a few moves which have been updated mid-generation. Pokémon Let's Go, Pikachu! & Let's Go, Eevee! continues this by providing a couple of changes to some moves

Name	Game	Type	Cat	PP	Base Power	Accuracy	Effect
Absorb	Let's Go			15	40	100	A nutrient-draining attack. The user's HP is restored by half the damage taken by the target.
	Sun/Moon			25	20	100
Mega Drain	Let's Go			10	75	100	A nutrient-draining attack. The user's HP is restored by half the damage taken by the target.
	Sun/Moon			15	40	100
Sky Attack	Let's Go			5	200	90	A second-turn attack move where critical hits land more easily. This may also make the target flinch.
	Sun/Moon			5	140	90
Solar Beam	Let's Go			10	200	100	In this two-turn attack, the user gathers light, then blasts a bundled beam on the next turn.
	Sun/Moon			10	120	100

In addition to the moves that just changed PP, Power or Accuracy, there are also some moves that changed other elements.

Name	Game	Type	Cat	PP	Base Power	Accuracy	Speed Priority	Effect
Teleport	Let's Go			20	--	--	-6	The user switches places with a different Pokémon instantly, using telekinetic power.
	Sun/Moon			20	--	--	0	Use it to flee from any wild Pokémon.