Game Freak explains why Exp. Share is baked into Pokemon Sword and Shield with no option to turn on/off

Pokemon Sword and Shield has done away with Exp. Share, and have instead gone with the decision to have all Pokemon leveled equally when battling. Some have been upset with this decision, as they liked the option to turn Exp. Share on and off. In an interview with InsideGamer, director Shigeru Ohmori said that when Exp. Share was a thing, most players had it turned on. What about those who had it off?

“Those who have it turned off want to train one specific Pokemon. We thought: is there a way to achieve that? There is, simply by putting the rest of your Pokémon in the PC.”