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>Pokemon have to eat. If they don't, their stats are lowered by two stages at the beginning of the battle due to fatigue. This does not apply to PvP battles.
>Restaurants similar to Gen 7's Battle Buffet and Malasala shops appear. When you order a dish, Pokemon Refresh is opened and you feed your Pokemon. Special effects from restaurant dishes replace Roto-Powers. "Take home" versions of the dishes are availiable for purchase.
>Pokemon Refresh no longer magically heals your Pokemon of status conditions. Instead, items such as Burn Heals, Awakenings, Rawst Berries, Full Restores, etc can be fed to your Pokemon via Refresh. Thus, using these items in menu now opens Refresh with the selected item in hand. If your Pokemon has a status condition at the end of battle, the Refresh prompt comes up only if you have the neccessary healing item.
>You can cook for your Pokemon using a mixture of items such as Pink Nectar, Luminious Moss, Berries, Mushrooms, Electric Seeds, Whipped Dream, Revival Herbs, etc. These dishes can function in many different ways. Some function like the restaurant dishes, others function like battle items (X Speed, X Attack, Dire Hit, etc), and some function like vitamins (Calcium, Protein, HP Up, PP Up).
>Natures, personality traits, and species affect what foods a Pokemon likes.
>You can play with your Pokemon in Refresh. You can purchase toys. Items such as Fluffy Tails and Poke Dolls function as toys.
>Contests return and food, along with brushing your Poemon in Refresh, play a major part EV training your Pokemon in contest stats such as Beauty or Toughness.
>Mega Evolution now requires max friendship and max affection.