Trait
Dissolution Spread
For each Poison-type skill brought into battle, Water-type skills inflict 1 stack of Poison on enemies.
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NO.077
Spikecarap Bug
Worn Form
Water Poison Phase II Regional Form
In water, ordinary Spiny Helmet Bugs easily get tangled in seaweed due to their long spines, while worn Spiny Helmet Bugs have short spines that both protect them and reduce movement resistance. When disturbed, they curl into a ball and defend with their hard spiny armor.
Dex Number
077
Category
Spiky Creature
Height
0.83~1.19 M
Weight
22.5~29.8 KG
Updated
2026-04-02
Distribution
Commonly found in oceans
Recommended Skill Sets
Pure Poison Stack Build
Playstyle
At the start, use Corrosive Acid or Plague Breath to quickly stack Poison; mid-game frequently use Venom Infiltration after its energy cost is reduced; Bubble Illusion for survival or baiting. Suppress enemy HP through high-frequency Poison stacking; Venom Infiltration serves both damage output and Poison renewal.
Why this set works
Maximize the trait [Dissolution Diffusion]: Carry 3 Poison-type skills (Corrosive Acid, Venom Infiltration, Plague Breath), enabling all Water-type skills to inflict poison. This build centers on Poison-type skills themselves, reducing Venom Infiltration's energy cost through quick poison stacking, Bubble Illusion ensures survival. The drawback is completely abandoning Water-type output, relying on Poison-type skills for damage.
Venom Infiltration
Why pick this skill
Core damage skill with energy cost decreasing with more enemy Poison stacks (minimum 20), and applies 1 Poison stack on hit. Forms virtuous cycle of Poison stacking → cost reduction → more Poison stacking, while triggering Trait to add Poison to Water-type skills.
Corrosive Acid
Why pick this skill
Stable 2-layer Poison application opener. Quickly stacks poison layers early to activate Venom Infiltration's cost reduction effect, while triggering traits as a Poison-type skill.
Plague Breath
Why pick this skill
Zero-cost Poison mark application, can续毒.→maintain Poison when out of Energy, or quickly stack layers with other skills; Poison marks and Poison effects can coexist, providing more layer calculations for Venom Infiltration
Bubble Phantom
Why pick this skill
Reaction skill provides 80% damage reduction + hit escape. Compensates for Thornhelm Bug's low physical defense survival weakness. Zero energy can save life at critical moments. Escape mechanism creates switching opportunity.
Water Burst Build
Playstyle
At the start, Brine Bath activates the energy reduction aura; Water Storage further reduces energy cost; Corrosive Acid applies Poison to trigger the trait; finally Spring gushes low-cost high-damage output. Achieve single-turn high burst through energy control, suitable for quickly breaking through enemies.
Why this set works
Built around Energy reduction-damage increase mechanic: Water Storage + Salt Bath double reduction to press Spring to extremely low Energy cost, triggering high power bonuses. Carrying 1 Poison-type skill (Corrosive Acid) activates trait, allowing Spring to apply Poison for sustained damage. Compared to the first set, focuses more on burst output rather than sustained Poison stacking.
Spring
Why pick this skill
Core damage skill. Combined with Water Storage/Brine Bath's cost reduction, can reduce Gushing Spring's Energy cost to extremely low levels (minimum 20), gaining high Power bonus (+40), achieving low-cost high burst damage.
Water Storage
Why pick this skill
Key skill for starting the cost-reduction chain. Next skill's Energy cost -6. Combined with Salt Bath, can reduce Gushing Spring's cost from 60→54→even lower, maximizing damage boost returns.
Saltwater Bath
Why pick this skill
Global energy reduction aura: -2 to all skill costs for self, -3 when countering defense. Stacked with Water Storage makes Spring almost free with massively increased power, while triggering trait to add Poison to Spring.
Corrosive Acid
Why pick this skill
Core Poison application skill. Applies 2 stacks of Poison to trigger Trait, causing subsequent Water-type skills (Spring) to apply Poison. Also satisfies Trait trigger conditions as a Poison-type skill.
Anti-Buff Interference Stream
Playstyle
Observe if the enemy has buff skills: if yes, use Poison Mist to convert; if no, use Venom Infiltration for direct damage. Water Splash maintains energy, Bubble Illusion handles key attacks. Create advantageous matchups through Poison Mist's strategic value.
Why this set works
Specialized counter against buff-type enemies: Poison Mist converts enemy buffs into Poison, removing threats while stacking Poison for your team. Pair with Venom Infiltration for quick damage output, Water Splash for energy cycling, and Bubble Phantom as a safety net. Effective against enhancement-focused opponents, but the damage pace is slightly slower than the second set in standard matchups.
Poison Mist
Why pick this skill
Enemy buffs are converted into Poison. Has strategic value against buff-reliant enemy formations; converted Poison stacks can immediately be utilized by Venom Infiltration to reduce energy cost, serving both utility and damage setup.
Venom Infiltration
Why pick this skill
Core damage. Uses Poison Mist-converted Poison stacks to greatly reduce Energy cost, while applying additional Poison for pressure. Poison-type skill triggers trait.
Water Splash
Why pick this skill
Energy recovery skill: 30 energy cost for 1 energy recovery, supplements energy when Venom Infiltration has high energy cost (insufficient enemy poison stacks), or use with energy reduction chains.
Bubble Phantom
Why pick this skill
Reaction skill provides survival guarantee. Zero energy usable at critical moments without disrupting damage rhythm
Notes
- Thorn Helmet Bug (Worn Form) is a Water-Poison dual-type special attack creature. Trait [Dissolution Diffusion] causes Water-type skills to apply Poison layers when carrying Poison-type skills, with core mechanics revolving around Poison stacking and energy cost linkage. Stat-wise 80 Magic Attack, 85 Magic Defense, 84 Speed are relatively balanced, but low Physical Defense requires attention to survival. Skill pool covers Poison application, energy cost reduction, buff conversion, high power burst and more functions—maximize Poison-Water linkage benefits according to trait.
- Venom Infiltration is core output: more Poison layers means lower cost and can refresh Poison. Corrosive Acid stably applies 2 Poison layers. Poison Mist converts enemy buffs to Poison, highly effective against buff teams. Plague Breath applies Poison mark for 0 cost, setting up follow-up skills. Among Water skills: Water Splash for energy, Water Storage for cost reduction, Salt Bath for global cost reduction, Spring for damage boost with cost reduction—flexible combination needed.
- The skill pool supports 2-3 approaches, but some skills overlap in function (e.g., multiple poison application methods), resulting in ~2 viable builds: one focusing on poison-water synergy for sustained pressure, another on energy control for burst output. Corrosive Acid and Venom Infiltration are both Poison-type, simultaneously triggering the trait to apply poison via Water-type skills.
Gallery
True Body
Fruit
Pet Egg
Evolution Chain
Skills
Lv. LV1
Water Splash
Energy: 30
Deals Magic damage. Self recovers 1 Energy.
Lv. LV4
Water Storage
Energy cost of next Skill used -6.
Lv. LV13
Corrosive Acid
Energy: 35
Deals Magic damage. Enemy gains 2 Poison stacks.
Lv. LV17
Corruption
For each Poison stack the enemy has, enemy gains -30% ATK and MATK.
Lv. LV27
Wishing Star
Energy: 110
Deals magic damage to the enemy creature.
Lv. LV28
Plague Breath
Enemy gains 1 stack of Poison Mark.
Lv. LV35
Bubble Phantom
80% damage reduction, when responding to an attack: retreat.
Lv. LV36
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. LV38
Poison Mist
Converts all enemy buffs into Poison.
Lv. LV41
Spring
Energy: 60
Deals Magic damage. For every -1 Energy Cost of this skill, Power +10.
Lv. LV48
Saltwater Bath
Self gains -2 All Skill Energy Cost, Against Defense: changed to -3 Skill Energy Cost.
Lv. LV50
Infection
Energy: 85
Deals Magic damage. If it defeats the target, converts Poison into Poison Mark.
Matchups
Weak Against
Electric, Earth, Phantom, Dark
Stats
HP 94
Physical Attack 33
Magic Attack 80
Physical Defense 59
Magic Defense 85
Speed 84
Total 435
Handbook Tasks
Spike Helmet Bug Archive 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
Confirm 2 different forms of Thorn Helmet Bug
Target: 2