In Johto, trees bear fruit. Apricorns, which Kurt turns into special Poké Balls, and Berries, which your Pokémon can hold to heal themselves mid-battle. Each tree gives one fruit per day: with a little regularity, you will never run short of anything.

Kurt’s Balls

Kurt, the craftsman of Azalea Town, makes a special Ball from each Apricorn. Bring him an Apricorn: the Ball is ready the next day. He can only work on one at a time.

ApricornBallEffect
RedLevel BallMore effective if your Pokémon’s level is higher than the wild Pokémon’s.
BlueLure BallMore effective on a Pokémon caught with a rod.
YellowMoon BallDesigned for Pokémon that evolve with a Moon Stone.
GreenFriend BallThe caught Pokémon is immediately more attached to you.
PinkLove BallDesigned for a Pokémon of the same species and the opposite gender to yours.
WhiteFast BallDesigned for fast Pokémon that tend to flee.
BlackHeavy BallMore effective on very heavy Pokémon.

Where to find Apricorns

ApricornLocationTree
White ApricornAzalea TownTo the north, near Kurt’s house
Red ApricornRoute 37Left bush in the west
Blue ApricornRoute 37Right bush in the west
Black ApricornRoute 37Bottom bush in the west
Pink ApricornRoute 42Bush in the middle of the map, the left one (Cut and Surf required)
Green ApricornRoute 42Bush in the middle of the map, the center one (Cut and Surf required)
Yellow ApricornRoute 42Bush in the middle of the map, the right one (Cut and Surf required)

Berries and their effects

When held by a Pokémon, a Berry activates by itself in battle. Outside of battle, it can also be used as a healing item.

BerryEffect
BerryRestores 10 HP.
Gold BerryRestores 30 HP.
Bitter BerryCures confusion.
PSNCureBerryCures poisoning.
PRZCureBerryCures paralysis.
Ice BerryCures a burn.
Burnt BerryThaws a frozen Pokémon.
Mint BerryWakes up a sleeping Pokémon.
Mystery BerryRestores 5 PP to a move.
Miracle BerryCures all status problems.

Where to find Berry trees

BerryLocationTree
BerryRoute 11Easternmost bush on the route.
BerryRoute 29North of the west entrance
BerryRoute 38Bush in the middle
BerryRoute 46Bush west of the Dark Cave entrance
Bitter BerryRoute 1Bush in the northwest of the route.
Bitter BerryRoute 31Bush in the middle, next to the sleeping man
Bitter BerryRoute 43Bush west of the pond (Cut and Surf required)
PSNCureBerryRoute 2Bush northeast of the tree maze.
PSNCureBerryRoute 33Bush to the southeast
PRZCureBerryViolet CityBush to the south, toward Route 32
PRZCureBerryRoute 46Bush west of the Dark Cave entrance
PRZCureBerryRoute 8Easternmost bush on the route.
Burnt BerryFuchsia CityBush to the northwest (Cut required).
Burnt BerryRoute 44Westernmost bush near Mahogany Town
Ice BerryPewter CityBush east of the Museum, the one on the right.
Ice BerryRoute 26Bush north of the house where the player can heal their Pokémon.
Ice BerryRoute 36Bush to the northwest
Mint BerryPewter CityBush east of the Museum, the one on the left.
Mint BerryRoute 39Bush near Moomoo Farm
Mystery BerryRoute 35Bush west of the pond (Surf required)
Mystery BerryRoute 45Bush near the pond at the far south of the route

For Gold Berries, also keep an eye out for items held by wild Pokémon and rewards from certain trades, like the Machop in Goldenrod City in Gold and Silver.