What it does
Unnerve prevents all opposing Pokémon on the field from consuming and activating their held Berries as long as the holder is present. Berries that already activated before the Unnerve holder entered are unaffected — this blocks new triggers, it doesn't reverse past ones.
What does blocking Berries actually stop? In Champions, the most impactful ones are: Sitrus Berry (25% HP recovery at half HP), Lum Berry (one-time status cure), Salac Berry (+1 Speed at 25% HP), Petaya Berry (+1 Sp. Atk at 25% HP), Liechi Berry (+1 Atk at 25% HP), and Chesto Berry (wakes from sleep). Each of those Berries is designed to either recover from a dangerous position or spike a stat for a counter-attack. Unnerve removes that safety net entirely.
Unnerve only affects opponents. Your own Pokémon's Berries work normally.
Who runs it
Aerodactyl: 93% Unnerve usage — the primary carrier by far. 130 base Speed is near the top of the game. Fast entry means Unnerve goes active as early as possible. Aerodactyl isn't just a Berry lock; it's a high-Speed physical attacker in its own right. The ability is extra disruption layered on top of an already-threatening Pokémon.
Corviknight: 3% usage. Steel/Flying, bulky. Unnerve persists longer on a durable Pokémon, but Corviknight usually runs Mirror Armor or Pressure instead.
Tyranitar: 1% usage — Sand Stream is almost always preferred.
How to use it
Unnerve is passive — no move cost, activates the instant Aerodactyl enters the field. From that point, opposing Berries are locked.
Sitrus Berry denial: bulky Pokémon often rely on Sitrus Berry to survive two hits rather than one. With Unnerve active, that recovery window disappears. A Pokémon that would have survived at low HP and healed to safety now stays at low HP and finishes off.
Pinch Berry denial: Salac, Petaya, and Liechi Berries are designed to trigger at 25% HP and give a last-stand stat spike. Unnerve removes those entirely — there's no sudden Speed or Attack surge from a nearly-fainted Pokémon. Your KO calculations become much more reliable.
Lum Berry denial: if you're running status moves like Will-O-Wisp or Thunder Wave, Lum Berry is the standard counter. Unnerve means they can't cleanse it on the turn it lands.
Tips & strategy
Berries only, not all consumables: White Herb, Mental Herb, Power Herb are not Berries and are not affected by Unnerve. Don't expect it to block those.
Switching breaks the effect: when the Unnerve holder leaves the field, Berry lockout ends immediately. In doubles this usually isn't an issue since Aerodactyl tends to stay in, but in singles, switching out gives opponents a free Berry trigger window.
Maximizing value against bulky teams: the more a team relies on Sitrus Berry and Lum Berry for durability and recovery, the harder Unnerve hits it. Teams built around tanky Pokémon with recovery Berries are exactly where Aerodactyl's Unnerve flips a matchup.
Aerodactyl's compound value: 130 Speed means it outspeeds almost everything, disrupts the field immediately, and can threaten physically. Unnerve is the free rider on top of that speed profile.