What are all the ways you can raise/lower a Pokemon's friendship?

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Walk 128 steps. This has a chance or raising your entire party’s friendship level by +2 points, or +1 level at friendship levels 200 - 255.

Get a massage.

Get a friendly drink, lunch, or combo at the food stalls. This raises your Pokemon’s level between +5 to +20 points, depending on what you order.

Battle against the Island Kahuna, an elite four member, or the Champion. This raises your Pokemon’s friendship level +5 points at levels 0-99, +4 points at levels 100 - 199, and +3 points at levels 200 - 255.

Level up your Pokemon. You can level up your Pokemon in battle. This will raise your Pokemon’s level +5 points at friendship levels 0 -99, +3 points at friendship levels 100 - 199, and +2 points at friendship levels 200 - 255.

Use a Wing. This raises your Pokemon’s friendship level +3 points at levels 0 - 99, +2 levels at levels 100 - 199, and +1 point at 200 - 255.

Use vitamins. These include the following: HP Up, Protein, Iron, Calcium, Zinc, Carbos, PP Up, PP Max, and Rare Candy.

Using EV Berries. These include the following: Pomeg Berry, Kelpsy Berry, Qualot Berry, Hondew Berry, Grepa Berry, and Tamato Berry.

Use a battle item. This raises your Pokemon’s frienship level +1 point at frienship levels 0-199. Battle items include the following: X Attack, X Defense, X Speed, X Sp. Atk, X Sp. Def, X Accuracy, Dire Hit, and Guard Spec.

Catching your Pokemon in a Luxury Ball raises it’s friendship faster.

Having your Pokemon hold a Soothe Bell also raises it’s friendship.

Using items such as potions on your Pokemon in battle will raise their friendship.

In Sword/Shield, playing with your Pokemon and making good curries in Pokemon Camp raises their friendship.

You can also seethis Bulbapedia pagefor lots of information about friendship in different games.

Note: In Generation 5, a new mechanic calledAffectionwas introduced. It is different from Friendship. This mechanic was removed in LGPE.

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To lower friendship, do one of the following:

One of the best ways to lower friendship fast is letting your Pokemon faint and continuously reviving it with Revival Herbs.

Increasing friendship with means other than Pokémon Camp will only maximize a Pokémon’s friendship value at 160, although this is sufficient for friendship-based evolutions. Pokémon Camp is the only means to reach the maximum friendship value of 255. Here are increasing friendship things:Walking 128 steps (sometimes; for whole party)Using a vitaminUsing a wingLevel up in battle

Max Friendship yields the following effects:Pokémon bounces when sent into battleText boxes indicate what it’s doing in battleDecent chance of preventing itself from being knocked out from a moveIncrease of experience gained from battle by 20%Chance of recovering from status conditions by itselfSlim chance of avoiding opponents movesCritical Hit ratio increased by 1

This is in Sword and Shield. Other ways include have a mon hold sooth bell and ev lowering and friendship increasing berries such as tamato berry. here are things that recude friendship:Using Energy Powder or Heal PowderUsing Energy RootUsing Revival HerbPokemon Fainting

Hope I Helped!

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