Evolution roadmap · Updated 2026-07-02
Mothra unlocks over three evolutions, not one purchase. Pick where you are on the roadmap below and see exactly what is left.
LarvaeCocoonQueenOpen roadmap ↓TL;DR: Mothra fast version
Pick the stage you already have. The roadmap opens the next step and collapses the rest so you only see what matters right now.
79 HRS REMAINING TO QUEEN
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Next step · Stage 1 · B tier
Mothra Larvae
Mobile, area-coverage kit added in Update 25. The entry point to the whole line.
The Larvae evolution option stays greyed out below Level 20. Arena matches level fastest early on.
Direct currency cost for the base Mothra unlock, separate from the Egg Fragment material.
Drops at roughly 18 percent per Breach Point event clear, based on community tracking. Plan on 4 to 6 runs.
A short one-time mission that triggers once you hold an Egg Fragment. Takes one server session.
Where the kit starts pulling weight. Needs the Silk Thread boss farm to progress.
Cocoon's gate sits well past the Larvae threshold. Keep running arena and event content in parallel with the Silk Thread farm below.
The Cocoon fusion cost, observed in the evolution menu as of Update 25.
Drops at roughly 22 percent per phase cleared on the Mothra dual-phase boss event, the same fight referenced in the arena stage guide. Budget several boss windows.
Unlocks once you hold at least one Silk Thread. A multi-phase fight, usually 1 to 2 sessions to clear.
Sustained-fire endgame form. The most expensive single leg of the climb.
The highest level gate on the Mothra line. Most players clear this while farming the Pollen Core below.
The largest single U-cell cost on the Mothra path. Redeem active codes before you start saving.
Drops at roughly 12 percent from the Lunar Event, a night-cycle spawn separate from the daytime Breach Point rotation.
A one-time alliance mission that opens after your first Pollen Core drop, similar in structure to other kaiju alliance missions.
About these estimates
Drop rates (Egg Fragment ~18%, Silk Thread ~22%, Pollen Core ~12%) come from community tracking, not official patch notes. Hours assume active farming on populated servers. Always check the exact recipe in your evolution menu before spending materials, since SULU KAKA adjusts costs without advance notice.
Three real starting points. Load one to jump the roadmap straight to that position.
Day 2 player
Just started
No Mothra yet. First target is the Egg Fragment and the Level 20 gate.
Week 1 player
Larvae done, stuck on Silk Thread
Farming the dual-phase boss for Silk Thread drops. This is the point most players stall.
Dedicated grinder
Cocoon done, chasing Queen
Level 55 and the Pollen Core are the last wall before the Queen fusion.
79 hours of active farming spreads very differently depending on how much you actually play per day. Here is what that looks like in calendar time.
| Play pace | To Larvae | To Cocoon | To Queen | Total |
|---|---|---|---|---|
| Casual (30 min/day) | 1 month | +1.8 months | +2.5 months | ~5.3 months total |
| Regular (1 hr/day) | 2 weeks | +4 weeks | +5 weeks | ~11 weeks total |
| Weekend (6 hrs/week) | 2.5 weeks | +4.5 weeks | +6 weeks | ~13 weeks total |
Estimates assume the hour totals from the roadmap above and steady daily or weekly play. Boss event timing and server population will push these numbers around. The U-cell farming calculator covers the currency side separately.
Most of the Mothra climb comes down to boss farming for Silk Thread and the Pollen Core. These are the levers that shorten it.
Join full servers for every Mothra boss window
The dual-phase boss clears faster with a full lobby, which means more phase completions per session and more chances at Silk Thread and, later, the Pollen Core.
Farm the level gate and the material drop in the same session
Cocoon's Level 35 requirement and the Silk Thread farm both come from playing through the same boss content. Chasing them separately wastes time you could spend on both at once.
Redeem active codes before you start saving U-cells
The Queen stage alone needs 1400 U-cells. Free U-cells from current codes chip away at that before you touch your farmed currency.
Track your own drop counts instead of trusting a fixed rate
The 18, 22, and 12 percent figures here come from community tracking, not official numbers. Server luck varies, and SULU KAKA has adjusted rates before without a patch note.
Confirm the recipe in your evolution menu before committing materials
Fusion costs shift between updates. Read the recipe preview for Larvae, Cocoon, and Queen before spending U-cells or materials on the wrong stage.
Mothra is worth building past Larvae if you want an area-of-effect kit that most early forms do not have. Larvae alone is B tier and mostly a mobility pick, useful for getting around the map but not for carrying fights on its own.
Cocoon is where the kit starts pulling weight in event grinding, since the Silk Thread boss farm already puts you in AoE-heavy fights. A lot of players stop here. It is the point where the time investment and the payoff line up best.
Queen is the expensive tail end: 37 of the 79 total hours for a sustained-fire upgrade. It matters most in long boss fights and does relatively little for quick PvP duels. If you play arena more than events, Godzilla Minus One or Destoroyah Form 4 pay off faster for the same U-cell budget. The best kaiju tier list breaks down where each form actually ranks.
Mothra comes in three separate forms unlocked one at a time: Larvae, Cocoon, and Queen. Larvae needs Level 20, 350 U-cells, and an Egg Fragment. Cocoon needs Level 35, 900 U-cells, and three Silk Thread drops from the Mothra boss event. Queen needs Level 55, 1400 U-cells, and a Pollen Core from the Lunar Event. Budget close to 79 hours total starting from nothing.
Reach Kaiju Level 20, save 350 U-cells, and farm an Egg Fragment. The fragment drops at roughly 18 percent per Breach Point event clear based on community tracking, so plan on 4 to 6 runs. Once you hold all three, the Larvae evolution unlocks in the kaiju menu.
Level your Larvae to 35, gather 900 U-cells, and farm three Silk Thread drops from the Mothra boss event, the same dual-phase fight referenced in the arena stage guide. Silk Thread drops at around 22 percent per boss phase cleared. Finish the Metamorphosis Trial mission after that and Cocoon unlocks.
From Cocoon, reach Level 55, save 1400 U-cells, and farm a Pollen Core from the Lunar Event, a night-cycle spawn with roughly a 12 percent drop rate. Complete the Queen's Ascension alliance mission and the fusion goes through. This is the longest single stage at around 37 hours.
Larvae alone is B tier and mostly a mobility pick. Cocoon is where the kit starts pulling weight in event grinding, since the Silk Thread farm already puts you in AoE-heavy fights. Queen is the expensive tail end at 37 of the 79 total hours, and it matters most in long boss fights rather than quick PvP duels. If you play arena more than events, Godzilla Minus One or Destoroyah Form 4 pay off faster for the same U-cell budget.
Larvae launched at B tier in Update 25. It has a mobile kit with area coverage that few other B tier forms match, but its damage ceiling sits below Suko. Most players treat it as a stepping stone rather than a long-term main.
No. The evolution chain is sequential: Larvae unlocks first, Cocoon requires an existing Larvae, and Queen requires an existing Cocoon. There is no direct purchase or shortcut past any of the three stages as of Update 25.
Join full servers during the Mothra boss window so the fight clears fast enough to get multiple phase completions per session. Farm Silk Thread and the Cocoon level requirement in the same session, since both come from grinding that boss window. Splitting them across separate sessions wastes spawns.
About this guide
Drop rates and stage costs are based on community tracking of the Mothra evolution line in Kaiju Alpha (SULU KAKA, Roblox Place ID 139769003880269), cross-checked against the Update 25 patch notes that introduced Larvae. SULU KAKA adjusts fusion costs and drop rates without advance notice, so always verify the exact recipe in your in-game evolution menu before spending materials. Written and maintained by Jim Liu. Last reviewed 2026-07-02.
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Free U-cells to cut into the 2650 total U-cell cost across all three Mothra stages.
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