According to director Shigeru Ohmori, Pokémon Sword and Shield does away with this item. However, when we followed up with Ohmori about whether that means we need to train up each individual Pokémon, he confirmed to us that every Pokémon in your party gets equal experience automatically as you progress through the game.
This is pretty huge and I don't know how this will affect those who don't want to use it for the extra challenge.
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For those who haven't played Pokémon in a long time, the Exp. Share since gen VI it can be turned on or off from the Bag menu in the overworld
If it is enabled, the experience and EVs earned when an opposing Pokémon faints or is caught is awarded to all of the Pokémon in the party individually. Pokémon that do not participate in battle only gain 50% of the possible experience (but all of the EVs).
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