Roco Kingdom Spinite, Spikrawl and Thornado: Full Evolution Line, Stats and Dissolution Trait

A strange, spiky creature crawling along the ocean floor might be easy to mistake for an ordinary rock. In Roco Kingdom, Spinite grows into Spikrawl and eventually Thornado, a Water / Poison-class Jini with sharp defensive spines and a powerful Poison-based trait. The entire line shares Dissolution, which allows Water-class skills to inflict additional Poison stacks depending on the number of Poison-class skills equipped. Here is how each stage evolves, how their stats improve and how to build around their unique combination of Water attacks and Poison pressure.

The evolution line

Spinite evolves into Spikrawl at Level 26, while Spikrawl evolves into Thornado at Level 42. All three stages belong to the Water and Poison classes.

1. Spinite (No. 076, Water / Poison): A small, spiny Jini that resembles a lifeless reef rock when completely still. It moves slowly along the ocean floor, becoming more active when food is available. The photoreceptor cells along its spines are highly sensitive to bright light, causing it to instinctively seek shelter in darker areas.
2. Spikrawl (No. 077, Water / Poison): As Spinite evolves, its body becomes larger and develops long, pointed spines. Shells, driftwood and seaweed frequently become caught on its barbs. Its elongated spines contain numerous light-sensitive cells, making it extremely sensitive to sunlight. To escape bright conditions, Spikrawl collects surrounding debris as camouflage and becomes more active when well-fed.
3. Thornado (No. 078, Water / Poison): The final evolution develops an intimidating body covered in long, sharp spines and powerful fins. Although usually sluggish, it can accelerate rapidly when threatened or exposed to bright light. Even the slightest contact causes its spines to converge toward the point of impact, delivering a painful sting and mild numbness through the Poison sacs at their tips.

The evolution line transforms from a small, slow-moving sea creature into a heavily armored predator covered in dangerous spines.

All three stages belong to the Fish and Beast Egg Groups.

The stats in this guide cover the Original Variant. The line also has a Worn-Out Variant with slightly different stat distributions.

Trait: Dissolution

For each Poison-class skill equipped, Water-class skills inflict 1 stack of Poison.

All three stages share this trait. Dissolution creates a direct connection between the number of Poison-class skills equipped and the Poison effects applied by Water-class skills.

Unlike traits that simply increase damage, Dissolution rewards players for combining two different classes of skills in the same moveset.

For example, equipping one Poison-class skill allows qualifying Water skills to apply 1 Poison stack. Equipping two Poison-class skills increases that amount to 2 stacks.

This makes skill selection particularly important. Adding more Poison-class skills strengthens the Poison application of Water attacks, but also leaves fewer skill slots available for other abilities.

Aqua Lash is an especially useful skill for this strategy. It is a Water-class magic attack with 30 Power and no Energy Cost, and it restores 1 Energy after use.

When paired with Dissolution, Aqua Lash can provide a way to deal damage, restore Energy and apply Poison without spending Energy on the attack itself.

Poison-class skills can then take advantage of the accumulated Poison stacks.

For example, Venom Seep becomes cheaper as the opponent accumulates Poison, while Corrosion can weaken enemies based on how many Poison stacks they have.

This allows Thornado to gradually pressure opponents rather than relying entirely on immediate damage.

Stats at every stage

Here is how Species Aptitude grows throughout the Original Variant evolution line:

1. Spinite, 327 total: HP 71, Physical Attack 25, Magic Attack 59, Physical Defense 46, Magic Defense 66, Speed 60
2. Spikrawl, 435 total: HP 94, Physical Attack 33, Magic Attack 79, Physical Defense 61, Magic Defense 88, Speed 80
3. Thornado, 545 total: HP 118, Physical Attack 41, Magic Attack 99, Physical Defense 76, Magic Defense 111, Speed 100

Spinite's total Species Aptitude increases from 327 to 435 after evolving into Spikrawl, then reaches 545 in its final form. That represents an overall improvement of 218 points across the evolution line.

HP is the strongest stat in Thornado's final form, reaching 118, followed closely by Magic Defense at 111.

Magic Attack also improves considerably, increasing from 59 in Spinite to 99 in Thornado. This makes magic-based skills much more effective than physical attacks.

Physical Attack remains extremely low at 41, so Thornado is poorly suited to physical offense.

Its 100 Speed gives it reasonable flexibility, allowing it to act ahead of some slower defensive Jinies while applying Poison or launching magic attacks.

However, Physical Defense reaches only 76, making powerful physical attackers a potential problem.

Thornado performs best when it can use its Magic Defense and HP to remain active while gradually weakening opponents through Poison.

Size and capture details:

1. Spinite: 0.55 to 0.7 m, 7.4 to 8.6 kg. Gives 16 Starlight and a 1,200 Roco Coin base review reward.
2. Spikrawl: 0.83 to 1.19 m, 22.5 to 29.8 kg. Gives 28 Starlight and a 2,100 Roco Coin base review reward.
3. Thornado: 1.11 to 1.33 m, 98.6 to 115 kg. Gives 40 Starlight and a 3,000 Roco Coin base review reward.

Class effectiveness

Spinite, Spikrawl and Thornado all belong to the Water and Poison classes, meaning their offensive and defensive matchups remain unchanged throughout evolution.

Spinite, Spikrawl and Thornado (Water / Poison)

When attacking with Water skills:

1. Deals ×2 damage to: Fire, Earth and Mech
2. Deals ×0.5 damage to: Flora, Ice and Dragon

When attacking with Poison skills:

1. Deals ×2 damage to: Flora and Charm
2. Deals ×0.5 damage to: Earth, Poison, Shadow and Mech

When defending as Water / Poison:

1. Takes ×2 damage from: Earth, Electro, Havoc and Stellar
2. Takes ×0.5 damage from: Fire, Poison, Bug, Fighting, Charm and Mech

Unlisted matchups deal normal ×1 damage.

The combination of Water and Poison provides useful offensive coverage against several classes.

Water attacks are especially effective against Fire, Earth and Mech, while Poison attacks deal double damage to Flora and Charm.

This gives Thornado an advantage against Fire and Mech opponents, since its Water attacks deal double damage while it takes only half damage from their class attacks.

Flora is another interesting matchup. Although Flora resists Water attacks, Poison skills deal double damage to Flora, allowing Thornado to threaten opponents that would otherwise resist its primary attacks.

However, Thornado has four important defensive weaknesses.

Earth, Electro, Havoc and Stellar attacks all deal double damage, making these classes particularly dangerous.

Earth is a risky matchup because both sides can deal increased damage: Water attacks hit Earth for double damage, but Earth attacks also hit Thornado for double damage.

Electro is another major threat, especially when used by fast or powerful attackers.

Defensively, Thornado benefits from six resistances. Fire, Poison, Bug, Fighting, Charm and Mech attacks all deal reduced damage, providing opportunities to enter battle and begin applying Poison pressure.

Research skills

Thornado has two listed research skills:

1. Water Storage: A Water-class Status skill with an Energy Cost of 1. It reduces the Energy Cost of the next skill used by 6.
2. Spring Gush: A Water-class magic attack with 90 Power and an Energy Cost of 6. For every 1-point reduction in its Energy Cost, its Power increases by 10.

These skills provide an interesting combination for Thornado's magic-based playstyle.

Water Storage allows Thornado to prepare an expensive skill by substantially reducing its Energy Cost.

Spring Gush benefits directly from Energy Cost reductions. If Water Storage applies its full 6-point reduction to Spring Gush, the attack gains 60 additional Power, increasing its base Power from 90 to 150.

This makes the combination useful for dealing powerful Water-class magic damage without paying the attack's full original Energy Cost.

Spring Gush also benefits from Dissolution when Poison-class skills are equipped, allowing it to apply Poison alongside its damage.

Other available skills complement this strategy.

Aqua Lash is a Water-class magic attack with 30 Power and no Energy Cost. It restores 1 Energy after use, making it useful for maintaining resources while applying Poison through Dissolution.

Corrosive Acid is a Poison-class magic attack with 35 Power and an Energy Cost of 2. It deals damage and applies 2 Poison stacks to the opponent.

Venom Seep is a Poison-class magic attack with 120 Power and an Energy Cost of 5. Each Poison stack on the opponent reduces its Energy Cost by 1, and the attack also inflicts an additional Poison stack.

Corrosion is a Poison-class Status skill that reduces the opponent's Physical Attack and Magic Attack based on their existing Poison stacks.

Foam Mirage is a Water-class defensive skill that reduces incoming damage by 80%. When it successfully counters an Attack skill, Thornado retreats from the field.

These skills allow Thornado to combine Poison stacking, magical damage, Energy efficiency and defensive utility.

A moveset focused on Dissolution should maintain enough Poison-class skills to strengthen Water attacks while leaving room for the Water skills that actually apply the pressure.

Specialties

All three stages share the same Specialty odds:

1. None: 64%
2. Ambusher: 6.9%
3. Affectionate: 6.9%
4. Nimble: 6.9%
5. Fleetfoot: 6.9%
6. Fearless: 6.9%
7. Sharer: 0.48%
8. Homebody: 0.48%
9. Helper: 0.48%
10. Merciful: 0.01%

Most Jinies in this evolution line have no Specialty, with a 64% probability.

Ambusher is useful for players who frequently capture wild Jinies, providing a guaranteed Backstab effect when throwing the Jini.

Nimble improves gathering range, making it useful during exploration and resource collection.

Fleetfoot offers additional movement utility, while Fearless can help during encounters with certain dangerous wild Jinies.

Merciful is the rarest Specialty at just 0.01%, allowing the Jini to leave wild opponents with 1 HP instead of defeating them with a lethal attack.

Where to start

1. Evolve Spinite into Thornado. Spinite evolves into Spikrawl at Level 26, then into Thornado at Level 42. Total Species Aptitude increases from 327 to 545, with significant improvements in HP, Magic Attack and Magic Defense.
2. Build around Dissolution. Each equipped Poison-class skill allows Water-class skills to inflict an additional Poison stack. Balance Poison skills with Water attacks to maximize the trait's value.
3. Use Aqua Lash to build Poison pressure. Aqua Lash costs no Energy and restores 1 Energy after use. Combined with Dissolution, it provides an efficient way to apply Poison while maintaining resources.
4. Combine Water Storage with Spring Gush. Water Storage reduces the next skill's Energy Cost by 6, while Spring Gush gains Power from Energy Cost reductions. This creates a strong magic attack combination that can also benefit from Dissolution.
5. Avoid Earth, Electro, Havoc and Stellar attackers. These classes deal double damage to Thornado. Its relatively low Physical Defense makes powerful physical attacks especially dangerous, so use teammates to cover unfavorable matchups.