Competitive Information for Onix [Ruby/Sapphire]
Rock / Ground
Abilities:
This Pokemon does not take recoil damage besides Struggle and crash damage.
OHKO moves fail when used against this Pokemon.

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Movesets for Singles
Looking for a competitive moveset for Onix? These builds are optimized for Ruby/Sapphire Single Battles. The movesets and EVs are designed to maximize damage against common opponents and threats in the Ruby/Sapphire metagame. Check out the expert movesets below to boost your battle performance and dominate your opponents!
Say hello to Onix, a stunning Pokémon that excels with Rock and Ground typing! Onix is not a Pokémon anyone usually expects to see on the battlefield. It can be quite a contender in the LC tier (Little Cup). It is weak to Fighting, Grass, Ground, Ice, Steel, and Water-typed attacks. Want to master Onix's movesets? Dive into our detailed strategies below!
Item: Shell Bell / Choice Band
Ability: Rock Head
Nature: Adamant (+Atk, -SpA)
EVs: 252 Atk / 4 SpD / 252 Spe
Moveset:
- Earthquake / Dig
- Double-Edge / Return
- Rock Slide / Rock Throw
- Rock Smash
In single battles, Onix is known as an impressive Physical Sweeper. It's designed to crush rivals using overwhelming physical moves. Prior to Generation IV, a move's damage category was determined by its type. Choice Band will increase the damage of Onix's physical moves by 1.5x at the cost of locking you into the first move you pick. The Shell Bell item option is to help Onix recover from the recoil damage it may take from Double-Edge. With Rock Head, Onix does not take recoil damage besides struggle and crash damage.
◆ Dig is a physical STAB-boosted 60-base power Ground-type move (digs underground turn 1, strikes turn 2).
◆ Double-Edge is a physical 120-base power Normal-type move (has 1/3 recoil).
◆ Return is a physical 0-base power Normal-type move (max 102 power at maximum happiness).
◆ Rock Slide is a physical STAB-boosted 75-base power Rock-type move (30% chance to make the foes flinch).
◆ Rock Throw is a physical STAB-boosted 50-base power Rock-type move that deals damage.
◆ Rock Smash is a physical 20-base power Fighting-type move (50% chance to lower the target's defense by 1 stage).
Link (click to copy):
https://hohoushome.com/b/caa5f
Item: Dragon Fang
Ability: Rock Head
Nature: Modest (+SpA, -Atk)
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
Moveset:
- Dragon Breath
- Harden
- Toxic
- Roar
In single battles, Onix is known as a terrific Special Sweeper. This approach seeks to take down the opponent's team with intense special power. Remember prior to Generation IV, a move's damage category was determined by its type. With Rock Head, Onix does not take recoil damage besides struggle and crash damage. With a Dragon Fang equipped to it, Onix's dragon-type attacks have 1.1x power.
◆ Harden is a status move (raises your Onix's defense by 1 stage).
◆ Toxic is a status move (badly poisons the target).
◆ Roar is a status move (forces the target to switch to a random ally).
Link (click to copy):
https://hohoushome.com/b/cba5f
Movesets for Doubles
Need a strong doubles moveset for Onix? These builds are perfect for VGC (Pokémon Video Game Championship) and other competitive Ruby/Sapphire Double Battles. The VGC is the ultimate test of strategy and skill, and these movesets and EVs are designed to excel against multiple opponents at once while providing essential support to your team. Dominate the Ruby/Sapphire metagame with these expert-crafted setups!
Item: Shell Bell / Choice Band
Ability: Rock Head
Nature: Adamant (+Atk, -SpA)
EVs: 252 Atk / 4 SpD / 252 Spe
Moveset:
- Earthquake / Dig
- Rock Slide / Rock Throw
- Double-Edge / Return
- Rock Smash
Prepare for double battles with Onix as a noteworthy Physical Sweeper. The intention of this moveset is to take down the opponent's team with powerful physical attacks. In the dark days prior to Generation IV, a move's damage category was determined by its type. Choice Band will increase the damage of Onix's physical moves by 1.5x at the cost of locking you into the first move you pick. The Shell Bell item option is to help Onix recover from the recoil damage it may take from Double-Edge. With Rock Head, Onix does not take recoil damage besides struggle and crash damage.
◆ Dig is a physical STAB-boosted 60-base power Ground-type move (digs underground turn 1, strikes turn 2).
◆ Rock Slide is a physical STAB-boosted 75-base power Rock-type move (30% chance to make the foes flinch).
◆ Rock Throw is a physical STAB-boosted 50-base power Rock-type move that deals damage.
◆ Double-Edge is a physical 120-base power Normal-type move (has 1/3 recoil).
◆ Return is a physical 0-base power Normal-type move (max 102 power at maximum happiness).
◆ Rock Smash is a physical 20-base power Fighting-type move (50% chance to lower the target's defense by 1 stage).
Link (click to copy):
https://hohoushome.com/b/daa5f
Item: Dragon Fang
Ability: Rock Head
Nature: Modest (+SpA, -Atk)
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
Moveset:
- Dragon Breath
- Harden
- Toxic
- Roar
Ready for double battles? Onix is a dazzling Special Sweeper. This moveset focuses to crush rivals using devastating special moves. Keep in mind back before Generation IV, a move's damage category was determined by its type. With Rock Head, Onix does not take recoil damage besides struggle and crash damage. With a Dragon Fang equipped to it, Onix's dragon-type attacks have 1.1x power.
◆ Harden is a status move (raises your Onix's defense by 1 stage).
◆ Toxic is a status move (badly poisons the target).
◆ Roar is a status move (forces the target to switch to a random ally).
Link (click to copy):
https://hohoushome.com/b/dba5f
Movepool
Want to know what moves Onix can learn? Check out the full list of moves available in the Pokemon Ruby/Sapphire generation.
Sort and organize the learnset by type, category, accuracy, and power. Moves in bold get the same-type attack bonus (STAB) when used by Onix.
Damage Modifiers:
Combo List
These are a list of several common move combinations Onix can perform in Ruby/Sapphire. Not every combo going to be game-changing, but some can be pretty fun to play with. Sometimes these can be easily overlooked or forgotten, hence why we find and list them here. Discover what items, abilities, and moves this Pokemon can use in combination with each other to gain a strategic advantage in competitive battles.
Competitive RS Move and Ability Combos for Onix
- Moves: Swagger + Psych up
- Moves: Swagger + Screech
- Moves: Endure + Flail
- Moves: Rest + Sleep talk
- Moves: Rest + Snore
- Move: Swagger + Item: Mirror Herb
- Move: Facade + Item: Flame Orb
- Move: Facade + Item: Toxic Orb
- Moves with Priority: Endure, Protect
- Moves that inflict status: Toxic
Moves that boost Onix's stats
- Harden
- Rage
Most notable and possible best moves for Onix
- Earthquake
- Protect
- Rest
- Taunt
- Toxic
Common Effort Values for Onix in Ruby and Sapphire
Usage Data
Explore the latest analytical usage data for this Pokémon from various VGC and online competitions. We use this data to develop our strategies and movesets. The data is categorized by competition and skill level: top-ranking trainers, mid-level players, and entry-level players.

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