Mid-stage Pokemon like Roselia rarely see competitive play outside of special formats. It's a waypoint on the road to Roserade, which is where the real potential kicks in. The stat spread leans into special offense. A competitive option since Gen 3.
Roselia's built around special offense. Sp. Atk leads the charge, Defense pays for it. Common in the wild, worth 2 Sp. Atk EVs. Follows a 1.06M XP medium-slow curve.
Though beautiful, it has highly poisonous thorns. There is an old tradition in my homeland wherein one would send these thorns to an opponent to challenge them to a duel.
Roselia Weakness
VulnerableRoselia's Grass/Poison typing leaves it vulnerable to Fire, Ice, Flying, and Psychic moves. It resists 5 types, giving it decent defensive coverage. Roselia's special bulk (base 80 Sp.Def) helps absorb special-type weaknesses, though physical moves exploit the lower Defense.
Roselia is partway through a three-stage line between Budew and Roserade. The chain involves an evolution item, so it's not a straightforward grind. So far, Sp.Atk got the biggest boost (+50 from Budew). The final form adds another 115 stats on top.
How to Evolve
Best Build
Legends: Arceus uses different battle mechanics.
Competitive build content is not applicable for this game. Select a main series game for builds.
Roselia's movepool balances level-up moves with TM options. Consistent STAB comes from Petal Dance and Energy Ball, and Fairy and Ghost coverage keeps opponents from switching in for free. No major gaps here.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
3 encounter spots for Roselia at decent spawn rates starting from mid-game routes. Best and Earliest sort options below help narrow down your approach based on odds vs. Accessibility.
Where To Catch Roselia in Legends: Arceus
To get Roselia, start by catching Budew through walking encounters at walking. The chain covers 2 catchable stages before reaching the final form.
Step 1Catch BudewEASYFabled SpringGrassUncommonEASYGapejaw BogGrassUncommonSwampEASYGolden LowlandsGrassUncommon
Step 2Roselia ✓EASYCloudpool RidgeGrassUncommonSkyEASYFabled SpringGrassUncommonEASYGapejaw BogGrassUncommonSwampor evolve from Budew (Step 1)
Roselia isn't fully evolved, so it's not built for competitive play. You'll want to evolve it into Roserade to unlock its full potential. At 400 BST, it's a stepping stone rather than a team anchor.
Run Natural Cure on Roselia. It's the ability that defines how you build around it and the main reason it holds a competitive niche. Roselia also gets Poison Point and Leaf Guard, but they don't compare.
Roselia fills the attacker role. It's a special attacker with base 100 Sp. Atk. At base 65 Speed, it won't be moving first often.
Roselia appears in 16 games, including Ruby & Sapphire, FireRed & LeafGreen, and Emerald.
Roselia has been available in 16 games since Ruby & Sapphire, though obtaining it requires an item-based evolution. This extra step makes it less common than Pokemon found through standard wild encounters.
- Gen IY
Yellow - Gen IRB

Red & Blue - Gen IIGS

Gold & Silver - Gen IIC
Crystal - Gen IIIRSDebut

Ruby & Sapphire - Gen IIIFRLG

FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS

HeartGold & SoulSilver - Gen IVDP

Diamond & Pearl - Gen VBW

Black & White - Gen VB2W2

Black 2 & White 2 - Gen VIXY

X & Y - Gen VIORAS

Omega Ruby & Alpha Sapphire - Gen VIIUSUM

Ultra Sun & Ultra Moon - Gen VIISM

Sun & Moon - Gen VIILGPE

Let's Go Pikachu & Eevee - Gen VIIISwSh

Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP

Brilliant Diamond & Shining Pearl - Gen IXSV

Scarlet & Violet - Gen IXLZA
Legends: Z-A