Accuracy and evasion are battle-only stats that change a move’s chance to hit. The game starts with a move’s listed accuracy, then applies the attacker’s accuracy modifier and the target’s evasion modifier, along with any ability, item, or weather effects. The result is compared to a random check to decide hit or miss.

Stage system at a glance

Both accuracy and evasion use stages from −6 to +6. Each stage maps to a multiplier. Accuracy uses the table directly, evasion uses the same numbers but works against the attacker.

• −6: 3⁄9
• −5: 3⁄8
• −4: 3⁄7
• −3: 3⁄6 = 1⁄2
• −2: 3⁄5
• −1: 3⁄4
• 0: 1
• +1: 4⁄3
• +2: 5⁄3
• +3: 2
• +4: 7⁄3
• +5: 8⁄3
• +6: 3

Final hit chance, in simplified form:

Final accuracy = Base accuracy × (Accuracy multiplier) ÷ (Evasion multiplier) × other modifiers

Common ways stages change

• Lowers accuracy: Sand-Attack, Smokescreen, Flash, Kinesis
• Raises evasion: Double Team, Minimize
• Resets all stat changes: Haze
• Passes current stages to a switch-in: Baton Pass

Abilities that matter in Emerald

• Compoundeyes: raises the user’s move accuracy
• Hustle: lowers the user’s accuracy for physical moves
• Keen Eye: prevents the user’s accuracy from being lowered by foes
• Clear Body: prevents the user’s stats, including accuracy and evasion, from being lowered by foes
• Sand Veil: raises the user’s evasion in sandstorm

Items that matter in Emerald

• BrightPowder: makes moves targeting the holder less accurate
• Scope Lens, Razor Claw, etc. affect crits, not accuracy
• White Herb: restores lowered stats once, which can clear an accuracy drop

Moves that ignore accuracy and evasion

Some moves bypass the accuracy-evasion check and simply hit if the target is not immune to the type and not unreachable that turn.

• Always hit: Aerial Ace, Shock Wave, Swift, Magical Leaf, Faint Attack, Vital Throw
• Guarantee next hit on a chosen target: Lock-On, Mind Reader

Weather and field notes

• Sandstorm boosts evasion via Sand Veil only, it does not raise evasion for other Pokémon
• Rain makes Thunder always hit its target
• Sun makes Thunder very unreliable
• Reflect and Light Screen do not affect accuracy, only damage after a hit

Edge cases and priorities

• A move with 100 accuracy can miss after modifiers if your accuracy is lowered or the foe’s evasion is raised
• A move with 70 accuracy can become reliable if you stack accuracy boosts and the foe has no evasion boosts
• Accuracy and evasion changes apply before the random hit check each turn

Practical tips

• If foes are using Double Team, clear the board with Haze or ignore the check with always-hit moves
• In sand teams, pairing Sand Veil users with BrightPowder pushes more misses over long battles
• Baton Pass chains can carry evasion boosts, so bring answers like Haze, Phase moves, or sure-hit moves
• Keen Eye or Clear Body users are dependable against accuracy-dropping strategies

In Emerald, accuracy and evasion are simple multipliers layered on top of a move’s listed accuracy, yet their impact is large. Control the stage battle, bring a sure-hit option, and use abilities or items that tilt the check in your favor.