Units

Get secret units from the right banner

Cyborg Plankton is a 0.025% gem pull, Dream Gary needs Magic Conches, and SpongeHenge is Prestige 10 or the Prestige Shop.

Get secret units from the right banner

Cyborg Plankton is a 0.025% gem pull, Dream Gary needs Magic Conches, and SpongeHenge is Prestige 10 or the Prestige Shop.

Secrets are not one banner

Unit How it is obtained Published rate or cost
Cyborg Plankton Gem banner 0.025% standard, 0.03% boosted
Dream Gary Exclusive banner 0.04% per Magic Conch summon
SpongeHenge Prestige 10, or the Prestige Shop 100 tokens, or 250 for Shiny Wumbo. Level 1 is 8,250 damage per cycle, 10 hits, full AoE.
Master Udon Karate Crates on Karate Island 1 in 200, which is 0.5%
Gorilla Premium banner Premium Dice
Sir Pinchelot Secret Chests Low drop. Chests come from quest milestones, hard clears, and playtime gifts.
Tony Tuna Admin crates Event drop
Hop Along Squidward Rotating shop Only while that offer is up

The boosted gem banner is a small change for Cyborg Plankton, from 0.025% to 0.03%. Its larger effect is on mythic odds. Auto-selling commons and rares during 50-pulls keeps the inventory usable. One in 4,000 is the standard Cyborg rate, so gem income from story, quests, and AFK is the real plan.

Magic Conches are not bought with ordinary coins. They come from map rewards, daily quests, achievements (up to 100 when maxed), treasure chests, and the merchant.

Karate Coin farming cited by high-level parties is floors 80 to 90 with Draconic Gloves, around 30 to 40 seconds a clear. That is a party route, not a new-account route.

Trading up

Duplicate mythics fused to 5 stars, plus Shiny and Wumbo tags, are the usual trade fuel. Quest divines, including Boys Who Cry members, cannot be offered. Secret Hunter is 1,249 Robux and Ultra Secret Hunter is 1,995. They raise odds. They do not change the banner a unit lives on.

Every secret above can be approached without Robux. Gems, conches, karate coins, and prestige levels are all farmable.

FAQ

Frequently Asked Questions

Is SpongeBob Tower Defense an official Roblox game?

Yes. It is a licensed SpongeBob SquarePants experience on Roblox from Wonder Works Studio and the Krabby Krew group, with Paramount, Nickelodeon, and Viacom named in the public game materials.

When can I redeem codes?

The code menu opens at player level 10. Before that, the box does not accept entries.

What do I keep when I prestige?

Prestige at level 100 is free. It resets your player level to 1 and keeps units, pets, gems, coins, items, and game passes.

Which tutorial unit should I pick?

Common SpongeBob, Patrick, and Squidward are starting choices for Conch Street. The published comparisons treat them as similar, so the pick does not decide your later account.