| Ability Capsule | vitamins | Switches a Pokémon between its two possible (non-Hidden) Abilities. | ₽10,000 |
| Ability Urge | miracle shooter | Forcibly activates a friendly Pokémon’s ability. | — |
| Abomasite | mega stones | Held: Allows Abomasnow to Mega Evolve into Mega Abomasnow. | — |
| Absolite | mega stones | Held: Allows Absol to Mega Evolve into Mega Absol. | — |
| Absorb Bulb | held items | Held: Raises the holder’s Special Attack by one stage when it takes Water-type damage. | ₽4,000 |
| Acro Bike | gameplay | More maneuverable than the Mach Bike, and allows hopping along rails. | — |
| Adamant Orb | species specific | Boosts the damage from Dialga’s Dragon-type and Steel-type moves by 20%. | — |
| Adrenaline Orb | held items | Makes wild Pokémon more likely to summon allies. Held: increases the holder’s Speed by one stage when affected by Intimidate. | ₽4,000 |
| Adventure Rules | gameplay | Contains basic gameplay information. | — |
| Aerodactylite | mega stones | Held: Allows Aerodactyl to Mega Evolve into Mega Aerodactyl. | — |
| Aggronite | mega stones | Held: Allows Aggron to Mega Evolve into Mega Aggron. | — |
| Aguav Berry | picky healing | Held: Consumed at 1/2 max HP to restore 1/8 max HP. Confuses Pokémon that dislike bitter flavor. | ₽80 |
| Air Balloon | held items | Held: Grants immunity to Ground-type moves, Spikes, and Toxic Spikes. Consumed when the holder takes damage from a move. | ₽4,000 |
| Air Mail | all mail | Lets a Trainer write a message and send it via Pokémon trade. | ₽50 |
| Alakazite | mega stones | Held: Allows Alakazam to Mega Evolve into Mega Alakazam. | — |
| Aloraichium Z Bag | unused | XXX new effect for aloraichium-z--bag | — |
| Aloraichium Z Held | z crystals | Held: Allows Alola Raichu to upgrade Thunderbolt into Stoked Sparksurfer. | — |
| Altarianite | mega stones | Held: Allows Altaria to Mega Evolve into Mega Altaria. | — |
| Amaze Mulch | mulch | Increases the total number of Berries by 2, increases the chance of Berry mutation, and causes soil to dry out in 4 hours. | ₽200 |
| Ampharosite | mega stones | Held: Allows Ampharos to Mega Evolve into Mega Ampharos. | — |