Red berries: you can get them in any game in the Berry Forest, but the chance of them being broken down into potions is small, so it is recommended that you go directly to the props store to buy red potions.
Blue berries: You can get them by playing Riptide (though the game is currently unplayable, and you may have to wait until next week to play it), and it's recommended that you go directly to the prop store to buy blue potions.
Yellow berries: play the game of catching fireflies in the berry forest, turn it off at the beginning of the game and don't score points, you can get yellow berries (not necessarily broken down into potions), props store can't buy yellow potions.
Black berries: go to the rainbow waterfall, point to the stone statue there, answer the question to enter the fountain of power, there is a tree, point to him, give him what he wants, wait for him to eat enough, emit a green light, wait there, the black berries as soon as they are born, quickly go to pick up (but it may be picked up by the other Moore, and may not necessarily be decomposed into a potion), props store can not be bought into the black potion.