Trait
Spreading Erosion
After using a Water-type skill, the enemy gains Poison stacks equal to 2 times the number of Poison Mark stacks.
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NO.244
Emerald Jellyfish
Water Poison Phase I Original Form
A soft-bodied sprite that propels through water by contracting its body to jet water. It uses tentacles to release toxins, paralyzing opponents before dragging them underwater.
Dex Number
244
Category
Jellyfish Sprite
Height
0.49~0.7 M
Weight
31.5~36.8 KG
Updated
2026-04-02
Distribution
Commonly found on the sea surface
Recommended Skill Sets
Summary
Emerald Jellyfish is a Water-Poison dual-type special attacker with high Magic Defense (109) and decent Magic Attack (68), but extremely low Physical Attack (30). Core trait [Spreading Erosion] inflicts Poison on enemies after using Water-type skills, with stacks equal to 2x Poison mark stacks, meaning rapid Poison stacking is needed to maximize benefits. Skill set revolves around Poison stacking, Water-type output, defensive responses, and energy management, suitable for sustained attrition battles.
Spread Stacking Poison Harvest Style
Playstyle
Open with 【Plague Breath】 to stack Poison, then use 【Skyflood】 to trigger Trait spreading Poison (2 layers to 4 layers). During this period, use 【Untouchable】 to Respond to enemy high-damage skills while continuing to stack Poison. When Poison layers reach 5+, use 【Venom Harvest】 to secure kills; power reaches 175 in Responding state.
Why this set works
Rapid poison stacking startup with [Plague Breath], [Deluge] as main Water-type damage triggering trait to spread poison and stack layers, [Zhen Poison] harvests at high poison stacks, [Untouchable] provides defense and additional poison stacking opportunities. Clear rhythm: startup → spread and stack poison → harvest.
Plague Breath
Why pick this skill
Core Poison stacking startup skill. 0 Energy cost to inflict 1 Poison stack on enemy, creating conditions for trait [Spreading Erosion] to trigger. The Poison source foundation for the entire strategy.
Heavenly Flood
Why pick this skill
Core Water-type damage skill. 120 energy cost deals magic damage, permanently -6 energy cost in counter state. Can spread Poison during attack with trait, main damage and poison stacking method.
Zhen Poison
Why pick this skill
Core burst skill, the higher the Poison stacks on enemy, the greater the Power (+10 per stack, +20 in Counter state). Used for execution after completing Poison stacking, 75 Energy cost is moderate.
Untouchable
Why pick this skill
Defensive response skill, 50% damage reduction + 10% additional reduction per Poison stack on enemy, reaching high reduction with stacked poison, while triggering trait poison spread when responding to attacks—both offensive and defensive.
Sustained Buff Attrition Build
Playstyle
Open with [Plague Breath], second turn [Fight Poison with Poison] to increase Magic Attack (assuming 2 poison layers for +60% Magic Attack), from third turn use [Venom Infiltration] for damage and continue stacking poison, energy cost decreases with poison layer count, use [Baptism] to dispel when debuffed, forming low-cost high-damage sustained suppression.
Why this set works
Startup with [Plague Breath], [Venom Infiltration] as main damage and poison stacking method, [Fight Poison with Poison] boosts magic attack after poison stack threshold, [Baptism] ensures sustain. Suitable for prolonged combat, growing stronger through cost reduction and buffs.
Plague Breath
Why pick this skill
0 Energy: Poison stacking initiation—creates profit conditions for all subsequent skills, the cornerstone of Poison-type playstyle.
Venom Infiltration
Why pick this skill
Core Water-type damage + poison stacking all-in-one skill. Lower energy cost with higher enemy Poison layers (can reach 0), and applies 1 Poison layer after attack. Can spread 2x layers with trait, core mid-game skill.
Fight Poison with Poison
Why pick this skill
Magic Attack buff skill: +30% Magic Attack per Poison stack on enemy; using after 2-3 Poison stacks significantly boosts subsequent output, serving as a damage amplifier
Baptism
Why pick this skill
Sustain guarantee skill: dispels own debuffs and gains -1 energy cost for all skills, use when enemy has dispel capability or when self is debuffed, ensuring sustained combat capability
High-burst fast attack style
Playstyle
【Plague Breath】setup Poison stacking, 【Skyflood】deals high damage and spreads Poison, if enemy is low HP use 【Poison Harvest】to cleanup, if situation is unfavorable or countered use 【Bubble Phantom】to retreat and adjust, find output opportunity again.
Why this set works
Aggressive output configuration: dual high-power skills [Deluge] [Poison] with poison stacking for quick pressure, [Bubble Illusion] provides survival means. Suitable for quick battles or games requiring flexible positioning.
Plague Breath
Why pick this skill
0 Energy Cost fast poison stacking, creating conditions for trait activation and [Zhen Poison] damage amp.
Heavenly Flood
Why pick this skill
High-power Water skill (150 Energy), permanent Energy reduction in Counter state. Suitable as main damage output to trigger trait's spreading poison, the core of burst damage.
Zhen Poison
Why pick this skill
Finisher-type skill. Power increases with Poison stacks. Used for execution after stacking Poison. Benefits double when in Response state.
Bubble Phantom
Why pick this skill
Emergency disengage skill, 80% damage reduction and retreat after responding to attack, survive when suppressed by counter types (Electric, Earth, Phantom, Evil), or adjust rhythm to restack poison
Notes
- The key to the trait [Spreading Erosion] is stacking Poison Marks first, then using Water-type skills to trigger spread. Thus, poison-stacking skills like [Plague Breath] have high priority.
- 【Fight Poison with Poison】provides Magic Attack boost, but requires the enemy to already have poison stacks, suitable as a second-turn startup skill.
- 【Untouchable】and【Bubble Mirage】are both response skills; the former suits tanking damage and stacking poison, while the latter suits emergency disengagement.
- 【Venom Infiltration】is core output skill, has Poison stacking, Energy reduction and damage, higher Poison stacks means greater returns
- 【Poisoned Wine】's power increases with poison stacks, doubling returns during Counter State, suitable for finishing
- 【Baptism】used to dispel debuffs and reduce Energy cost, is key to sustainability
- Emerald Jellyfish is weak to Electric, Ground, Phantom, and Dark, watch for typing disadvantages
Gallery
True Body
Fruit
Pet Egg
Evolution Chain
Stage 1
Emerald Jellyfish
Skills
Lv. LV1
Water Splash
Energy: 30
Deals Magic damage. Self recovers 1 Energy.
Lv. LV1
Baptism
Dispels all debuffs from self and gains -1 Energy Cost for all skills.
Lv. LV5
Untouchable
50% damage reduction. For each stack of Poison on the enemy, this skill's damage reduction increases by 10%. Counter.
Lv. LV11
Corrosive Acid
Energy: 35
Deals Magic damage. Enemy gains 2 Poison stacks.
Lv. LV16
Fight Poison with Poison
For each Poison stack the enemy has, gain +30% MATK.
Lv. LV24
Miasma Spray
Energy: 100
Deals magic damage to the enemy creature.
Lv. LV26
Bubble Phantom
80% damage reduction, when responding to an attack: retreat.
Lv. LV33
Rapids
Energy: 120
Deals magic damage to the enemy creature.
Lv. LV34
Plague Breath
Enemy gains 1 stack of Poison Mark.
Lv. LV37
Annihilation
Energy: 155
Deals magic damage to the enemy creature.
Lv. LV41
Venom Infiltration
Energy: 120
Deals Magic damage. For each Poison stack on enemy, this skill's Energy Cost -1, and enemy gains 1 Poison stack.
Lv. LV45
Zhen Poison
Energy: 75
Deals Magic damage. For each Poison stack on enemy, this skill's Power +10. Counter status: Instead, this skill's Power +20.
Lv. LV46
Heavenly Flood
Energy: 150
Deals Magic damage. Counter status: This skill's Energy Cost permanently -6.
Matchups
Weak Against
Electric, Earth, Phantom, Dark
Stats
HP 108
Physical Attack 30
Magic Attack 68
Physical Defense 75
Magic Defense 109
Speed 76
Total 466
Handbook Tasks
Jade Jellyfish's Tome Mission
Progress: 7/7
Catch 1 Pokémon
Target: 1
Catch 1 Pokémon with Amazing Talent
Target: 1
Successfully evolve a creature 1 time
Target: 1