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From Pokémon Emerald, the Kelpsy Berry can be used from the Bag on a Pokémon to increase the Pokémon's friendship (+10 at friendship 0-99, +5 at friendship 100-199, +1SwSh-/+2E-USUM at friendship 200-254) and lowers its Attack EVs by ten points (but not below 0). In Generation IV only, this Berry reduces the EV to 100 if it was above 110 when used.
Kelpsy Berries have a base Berry Powder of 100 and a difficulty of 100. With two players, this Berry will contribute 200 units of Berry Powder at 100% silkiness.
15 Kelpsy Berries, Oran Berries, and Maranga Berries are used to dye any white or dyed clothing into pastel blue. 15 Kelpsy Berries, Apicot Berries, and Chesto Berries are used to dye any white or dyed clothing into pastel navy blue.
A Kelpsy plant will yield 1-5 Berries. A growing Kelpsy plant's soil dries by 8% every hour, fully drying out in 13 hours.
Generation V
Planted 0 hours
Sprouted 12 hours
Taller 24 hours
Flowering 36 hours
Berries 48 hours
A Kelpsy plant will yield ? Berries.
Generation VI Pokémon X and Y
Planted 0 hours
Sprouted 8 hours
Growing 16 hours
Bigger 24 hours
Budding 32 hours
Bloom 40 hours
Berries 48 hours
A Kelpsy plant will yield 1-20 Berries. During its growth, watering the plant adds 0.5 Berries to the final harvest, weeding it adds 1.5, and removing a pest adds 3. Kelpsy plants attract Volbeat as pests. If grown next to each other, a Kelpsy Berry and a Wacan Berry may mutate into an Apicot Berry.
Pokémon Omega Ruby and Alpha Sapphire
Planted 0 hours
Sprouted 8 hours
Taller 16 hours
Flowering 24 hours
Berries 32 hours
A Kelpsy plant will yield 2-26 Berries.
Generation VII Pokémon Sun, Moon, Ultra Sun, and Ultra Moon
Planted 0 hours
Sprouted 30 hours
Taller 36 hours
Flowering 44 hours
Berries 48 hours
A Kelpsy plant will yield 5 Berries if Isle Aplenny is at Phase 1, 9 Berries if it is at Phase 2, and 14 Berries if it is at Phase 3.
Generation VIII Pokémon Brilliant Diamond and Shining Pearl