#0252 · Hoenn · Generation 3 · starter

Treecko

Wood Gecko Pokémon · Grass-type

Treecko is a Grass-type Pokémon, the Wood Gecko Pokémon, number 252 (#0252) in the National Pokédex. It was introduced in Generation 3 and comes from the Hoenn region. It is 0.5 m tall and weighs 5 kg.

Treecko is the Wood Gecko Pokémon, a Grass-type starter so cool and collected that it glares straight back at foes far bigger than itself.

How to pronounce Treecko

Treecko is pronounced TREE-koh. The capital letters show the stressed syllable.

Listen to Treecko said out loud:

In Japanese it is キモリ (Kimori).

Hear every other name on the Pokémon pronunciation guide.

Lore

Biology

Treecko is a small green gecko, 0.5 m tall and 5 kg, with slit-pupilled yellow eyes, a red throat and belly, three-toed hands and feet, and a thick dark green tail. Tiny hooks under its feet let it scale vertical walls and even hang upside down from ceilings. Its tail senses humidity, which it uses to forecast the next day's weather.

Behaviour

Treecko never panics. If a bigger foe glares at it, the Pokédex says, it glares right back without giving up an inch of ground. It nests in a giant tree and guards its territory ferociously, so the Emerald Pokédex names it the forest's tree guardian. Its favourite attack is a tail slam.

Habitat

The Pokédex lists forests, and Bulbapedia says Treecko is rarely seen in the wild. In Scarlet and Violet it can be found in the Canyon Biome added by The Indigo Disk.

Powers

Its Ability is Overgrow, which boosts Grass moves by half when its HP runs low; the hidden Ability Unburden doubles its Speed once it uses up or loses a held item. In Scarlet and Violet it learns Giga Drain at level 21 and Leaf Storm at level 39. With base Speed 70 and Special Attack 65 it is quick but frail.

Name origin

Treecko joins 'tree' and 'gecko'. The Japanese name is Kimori (キモリ), which Bulbapedia says may play on 守宮 yamori ('gecko') alongside 木 ki ('tree'), 森 mori ('forest') and 守り mori ('keeper').

Design inspiration

Treecko appears to be based on a gecko, specifically the leaf-tailed gecko, which hides among plant-like growths and climbs sheer surfaces. Its green body and red underside may nod to the male green anole, whose throat flap turns red to show dominance. These are fan readings.

Evolution notes

Treecko evolves into Grovyle at level 16, and Grovyle into Sceptile at level 36.

In the games

Treecko is the Grass option among the three Hoenn partner Pokémon Professor Birch offers at the start of Ruby and Sapphire, and it returns in Emerald and in Omega Ruby and Alpha Sapphire. In Legends: Z-A it is available only in the Mega Dimension DLC, in the Grass-type wild zones of Hyperspace Lumiose.

In the anime

Ash caught his Treecko in 'Tree's a Crowd', where a band of Treecko were looking after an old tree that seemed to be dying. Sawyer also owned one.

Fun facts

• When May picked her first partner in 'Get the Show on the Road!', she passed over Treecko because it 'creeped her out'.
• In the Pokémon Adventures manga, beauty-obsessed Ruby passes Treecko over for Mudkip because he thinks it looks ugly.
• Spiders have been named after the whole line: Rathalos treecko, Anyphaena grovyle and Anyphaena sceptile, each chosen because the spider was found in a forest.
• Early concept art for Ruby and Sapphire shows Treecko designs that look much more like real geckos.

Sources: Bulbapedia: Treecko (Pokémon) · Serebii: Treecko (Scarlet/Violet Pokédex)

Base stats

• HP: 40
• Attack: 45
• Defense: 35
• Sp. Atk: 65
• Sp. Def: 55
• Speed: 70

Treecko’s base stat total is 310. Its highest stat is Speed.

Type matchups

What is Treecko weak to?

Treecko takes extra damage from Fire (2×), Ice (2×), Poison (2×), Flying (2×), Bug (2×) moves.

It resists Water (½×), Electric (½×), Grass (½×), Ground (½×).

Evolution

How does Treecko evolve?

Treecko evolves into Grovyle at level 16.

The whole family: Treecko, Grovyle, Sceptile.

• Grovyle evolves into Sceptile at level 36.

Abilities

• Overgrow: Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.
• Unburden (hidden ability): Doubles Speed upon using or losing a held item.

Moves

Moves Treecko learns by level up in Scarlet / Violet

TM moves (41)

Treecko can learn 41 moves from TMs in Scarlet / Violet: Take Down, Agility, Protect, Low Kick, Acrobatics, Thief, Trailblaze, Facade, Aerial Ace, Swift, Magical Leaf, Rock Tomb, Fling, Dragon Tail, Endure, Sunny Day, Dig, Bullet Seed, Brick Break, Thunder Punch, Sleep Talk, Seed Bomb, Drain Punch, Grass Knot, Rest, Rock Slide, Swords Dance, Substitute, Crunch, Giga Drain, Energy Ball, Helping Hand, Grassy Terrain, Grass Pledge, Leaf Storm, Solar Beam, Tera Blast, Grassy Glide, Endeavor, Breaking Swipe, Upper Hand.

Egg moves (8):Absorb, Double Kick, Dragon Breath, Leech Seed, Night Slash, Slash, Synthesis, Worry Seed.

Breeding & training

• Gender: 87.5% male, 12.5% female.
• Egg groups: Monster, Dragon.
• Egg cycles: 20 (steps to hatch, Scarlet/Violet: 2,560).
• Catch rate: 45 out of 255.
• Base friendship (Gen 8 onward): 50.
• Growth rate: Medium Slow (1,059,860 experience points to reach level 100).
• Defeating it gives 1 Speed effort value.
• Base experience yield: 62.

Pokédex entries

Treecko is cool, calm, and collected - it never panics under any situation. If a bigger foe were to glare at this Pokémon, it would glare right back without conceding an inch of ground. (Sapphire, Alpha Sapphire)

Treecko has small hooks on the bottom of its feet that enable it to scale vertical walls. This Pokémon attacks by slamming foes with its thick tail. (Ruby, Omega Ruby)

Small hooks on the bottom of its feet catch on walls and ceilings. That is how it can hang from above. (HeartGold, SoulSilver, Y)

It quickly scales even vertical walls. It senses humidity with its tail to predict the next day's weather. (FireRed, LeafGreen, X)

The soles of its feet are covered by countless tiny spikes, enabling it to walk on walls and ceilings. (Diamond, Pearl, Platinum, Black, White, Black 2, White 2)

It makes its nest in a giant tree in the forest. It ferociously guards against anything nearing its territory. It is said to be the protector of the forest's trees. (Emerald)

Names around the world

Trivia

• Taller than 19% of all Pokémon (0.5 m).
• Heavier than 15% of all Pokémon (5 kg).
• Base stat total 310, ranked #804 of 1,025.
• One of 127 Grass-type Pokémon (counting dual types).
• One of 130 green Pokémon.
• Number 1 of 135 Pokémon introduced in Generation 3 (Hoenn).
• Part of an evolution family of 3 Pokémon.
• Can learn 60 different moves in Scarlet / Violet.
• Catch rate 45: about 5.9% per Poké Ball at full health.
• Appears in 6 distinct Pokédex entries.

Sources and fact-checking

• Stats, types, abilities, moves, evolutions, forms and Pokédex entries: PokéAPI open game data.
• Lore: written by pokee.si in our own words, researched from Bulbapedia: Treecko (Pokémon), Serebii: Treecko (Scarlet/Violet Pokédex).
• Pronunciation (TREE-koh): it follows how the English anime, games or official videos say it.

Last checked: 20 October 2026. Every sentence of the lore was checked against Bulbapedia, Serebii and the game data.

Explore

Grass-type Pokémon · Treecko vs Torchic · Treecko vs Mudkip · Hoenn region guide · Overgrow ability · Unburden ability · Compare Treecko · Full Pokédex · Type chart · All moves

Browse similar Pokémon

Gen 3 Grass-type Pokémon · Gen 3 Pokémon list · Green Pokémon list · Monster egg group · Dragon egg group · Pokémon that start with T · Lizard Pokémon

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