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Berries
Berries are Pokémon consumables that that can be held in-battle.
Berries share functional identicalities to commonly used Pokémon supplements, such as Potions and ailment curatives; one of the more salient differentiators from them is they are auto-consumable by its holding Pokémon in-battle, meaning that the Pokémon will automatically use it when the conditional thresholds are met and thus saves you from using your turn in-battle to select an item to fulfill that function.
The available berries in Pokémon Revolution Online can be compartmentalized into three agential categories: restorative berries, curative berries, and EV-reductive berries.
Available berries
Restoratives
Restoratives will replenish depleted HP or PP points for the consumptive Pokémon.
| Berry | Tree | Function | |
|---|---|---|---|
 | Oran Berry |  | Restores the consumer's HP by 10 points |
 | Leppa Berry |  | Restores the consumer's PP by a static amount 10 points |
 | Sitrus Berry |  | Restores the consumer's HP by 25% of its maximal amount |
Curatives
Curatives will expunge Status ailments that the consumptive Pokémon might be afflicted by. If held in-battle, the holding Pokémon will automatically consume it after the status ailment is onset.
| Berry | Tree | Function | |
|---|---|---|---|
 | Cheri Berry |  | Cures the consumer of paralysis |
 | Pecha Berry |  | Cures the consumer of poison |
 | Rawst Berry |  | Cures burned consumers |
 | Aspear Berry |  | Defreezes frozen consumers |
 | Persim Berry |  | Cures the consumer of confusion |
 | Chesto Berry |  | Wakes up the consumer if they are asleep |
 | Lum Berry |  | A wildcard berry that will cure any status ailment that the consumer may be afflicted by |
EV-reductors
EV-reductive berries will reduce the consumptive Pokémon's EVs for the corresponding stat by 10 points. As a secondary effect, they will also enhance your Pokémon's happiness points.
These are instrumental for the continuity of EV-training, since only up to 252 Effort Values can be apportioned to each stat with a cumulative cap of 510; as such, they let you winnow out eventually unwanted Effort Value points for a stat. With a combination an intake these berries and retraining your Pokémon's EVs, which are recalculated on an after-battle basis in PRO, you can reapportion your Pokémon's EV spread.
| Berry | Tree | Function | |
|---|---|---|---|
 | Pomeg Berry |  | Reduces the consumptive Pokémon's HP EVs |
 | Kelpsy Berry |  | Reduces the consumptive Pokémon's Attack EVs |
 | Qualot Berry |  | Reduces the consumptive Pokémon's Defense EVs |
 | Hondew Berry |  | Reduces the consumptive Pokémon's Special Attack EVs |
 | Grepa Berry |  | Reduces the consumptive Pokémon's Special Defense EVs |
 | Tamato Berry |  | Reduces the consumptive Pokémon's Speed EVs |
Obtainability
Berry trees
- Main article: Berry trees
Berries are principally obtained by harvesting them from berry trees, which can be found in most tillage-viable areas—namely Category:Routes and Category:Forests, wherein most berry-tree allotments can be found.
Berry trees are monoproductional, meaning that they will return the exact-same berry archetype each time it grows. Most berry trees will regrow after three real-world days have elapsed; the only outlier to that is the EV-berry trees, which regrow after 4 days.
Berry Towers
- Main article: Berry Towers
Berry Towers are sites peculiar to PRO that are one of the most prolific hotbeds for berry-obtaining, as they reward its challengers with EV-reductive berries.
The Berry Tower challenge entails carrying a full on-hand lineup of level-50-plus Pokémon and defeating a gauntlet of NPCs en route to the top floor; losing to any one of them will effectively forfeit the reward payout, since you will respawn in a Pokémon Center and be precluded from rechallenging it until the cooldown time has elapsed (which is initiated as soon as you venture into the challenge).
For a fee of 
2,000, you can do the elite-mode challenge of the Berry Tower; this will reward the entire gamut of EV-reductive berries contingent that you complete it. The elite-mode challenge has a three-day cooldown, as opposed to the standardly one-day cooldown.
Berry shops
Upon defeating the Pumpkin King boss on Route 6, a berry-vendor will be made accessible in Goldenrod City Flower Shop. He will sell all EV-reductive berries for 3,000 apiece, thereby providing the most prolific avenue of obtaining them for those that are affluent enough to expend the requisite Pokédollars for them.
Extra-organic usages
All non-EV-reductive berries can be sold to the item-buyers that exist on the first floor of all Department Stores for 25 apiece, thereby providing a more marginal method of moneymaking for those that have plentifully collected berries.