Rock Tank
Rubblet
Rubblet guide for Clash Critters with role notes, upgrade priority, best modes, teammate ideas, image sources, wiki facts, and conservative build advice.
Quick Verdict
Azure Flare is the page's main hook
Azure Flare should be the first thing you judge when testing Rubblet. Start with stages where one side of the board collapses before damage units can work. Its role has to show a practical improvement before the next upgrade tier.
The current wiki stat grades list Attack E, HP E, Defense C, which helps set expectations before you compare it with alternatives. It starts the Rubblet -> Cobbledon -> Rockzilla line, so early spending should be judged by whether that full path interests your account. Its Purple tier puts it in a comparison band where same-role alternatives deserve a look before deeper spending.
F2P value: Steady if Rubblet prevents resets without demanding the same resources as a carry.
Best Modes
Good places to test
- Campaign pushes where Rubblet can take the first contact for a weak lane
- Gold Mine Rush defense tests that reward durable placements
- Teams built around fragile Rock damage dealers that need more time to work
Be careful in
- Timeout losses where the existing frontline already survives
- Boss attempts where every open slot must increase damage uptime
Compare results against the Gold Mine Rush guide, Boss Challenge guide, and Horde Invasion guide.
Best Teammates
Rubblet should sit in front of damage dealers that benefit from the time it buys, especially same-element projects that share upgrade planning.
Use these as comparison partners, then keep the pairing that makes Rubblet's listed skill easiest to measure.
Upgrade Priority
Priority: Rubblet moves up the queue when early contact is the reason the formation falls apart.
Check the starter form in the Rubblet -> Cobbledon -> Rockzilla line against your current account goal: campaign push, mode farming, or a specific element gap.
Stop if Rubblet is no longer part of your active board, if a same-role Tatari gives cleaner results, or if the next upgrade delays a stronger line.
Appearance
Visual notes summarized from wiki.gg.
Evolution Trial
Trivia
Short wiki-derived facts rewritten for this guide.
- Prior to the update on 2/10/2026, its bio used to say: "Screening No.86 revealed a promising subject that we might be able to use to create new creatures." -Dr.
- Prior to the update on 3/11/2026, its bio description said: "Screening No.86 revealed a promising subject that we might be able to use to create new.
- Prior to the update on 5/13/26 its bio description said: Rubblet releases unstable energy from inside the body by firing blue beams.
- Rubblet's Korean name used to be 록자드 Rockzard which was same with Cobbledon's Korean name, before the July 4 2025 update with a new name to it - 스톤자드 Stonezard.
Skills
- Azure Flare: Fires a searing blue beam, dealing AoE damage.
Strengths and Weaknesses
Strengths
- Area damage gives Rubblet a clear reason to test it against crowded waves.
- Rock typing makes it easier to slot into teams that need that element without changing the whole board.
- Its evolution position (starter form in the Rubblet -> Cobbledon -> Rockzilla line) helps decide whether the unit is a short bridge or a longer project.
Weaknesses
- Area-focused value drops sharply when the fight feeds enemies one at a time.
- Public data does not confirm every exact number, so compare repeated attempts rather than one lucky clear.
- Rubblet can be outclassed if another Tatari covers the same Tank job with better current investment.
Common Mistakes
- Testing Rubblet while changing several other slots, which makes it hard to tell whether AoE burn pressure helped.
- Continuing upgrades after Rubblet has already fallen out of the active 15-slot board.
- Calling one lucky clear proof when the same setup fails repeated attempts.
FAQ
Is Rubblet worth building in Clash Critters?
Rubblet is worth attention when AoE burn pressure is the answer your team is missing. If the stage is asking for a different job, keep it as a comparison pick rather than forcing upgrades.
Is Rubblet good for beginners?
Beginners should use Rubblet only when its Tank job enters the active board. A high-rarity or interesting skill is not enough by itself.
What team should I use with Rubblet?
Rubblet should sit in front of damage dealers that benefit from the time it buys, especially same-element projects that share upgrade planning.