The long-awaited Update 20 has arrived in Spongebob Tower Defense Roblox, bringing a powerful new unit, game-changing rarity, and fresh features for smoother gameplay.
Whether you’re chasing crates or grinding free rewards, this update is packed with reasons to log back in.
New Rarity – Exotic
Exotic is now the highest rarity tier in the game, surpassing even Shiny units.
Each Exotic unit comes with a minting number, meaning you’ll know exactly how rare your version is.
There are four versions of Exotics:
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Normal
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Shiny
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Wombo
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Shiny Wombo
Each version improves on damage, range, and cooldown, making Exotic units top-tier in any team composition.
Mega Hydra Karen – New Exotic Unit
The spotlight of this patch is Mega Hydra Karen, an Exotic unit with massive stats and a devastating area skill.
Base Stats (Max Level)
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Damage: Up to 95,000
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Cooldown: 1.1 seconds
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Range: 60 units
Special Ability – Laser Blast
Mega Hydra Karen fires three huge green lasers with wide splash damage.
This skill is perfect for clearing waves of enemies or weakening bosses.
It has a base cooldown of 90 seconds, which drops to just 17 seconds if you’re playing at 5x speed.
Timing this move properly can shift the entire tide of a match.
How to Get Mega Hydra Karen
There are two ways to unlock this powerful Exotic unit:
Free via Playtime Rewards
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Rare drop chance: 1 in 20,000
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Temporarily boosted during x20 Luck Event
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Only available until Monday midnight (server time)
Paid via Gacha Crates
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Purchase crates from the in-game shop
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Options: Buy 1, 3, or 5 crates
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Larger bundles come with a discount
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Requires Robux to access this method
Both options are available for a limited time, so choose your strategy wisely.
Quality of Life Features
Update 20 introduces multiple QoL improvements designed to streamline your gameplay:
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New targeting priorities – Focus on bosses, strongest, or fastest enemies
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Claim All Quests – Redeem all mission rewards with one tap
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Team Replace – Quickly swap entire team loadouts
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Infusion Max Select – Merge units in bulk with a single button
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Swap Units Easier – Instantly choose which unit to remove when your slots are full
These changes make grinding and organizing your team much faster and more efficient.
Tips for Using Mega Hydra Karen
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Activate her skill during dense waves or boss waves to maximize impact
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Use high game speed to reduce skill cooldown dramatically
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Pair with support units like Seabear or Secret Formula for better control
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Adjust attack priority to make her focus on the most dangerous threats
If used correctly, she can carry your defense through late-game stages with ease.
Active Code for Update 20
Don’t forget to redeem the newest code released with this patch:
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GIVEMEDRAGONCAPSULES
Enter it through the code menu to claim your reward.
Check the full list of Spongebob Tower Defense codes to see if any old ones still work.
Final Thoughts
Spongebob Tower Defense Update 20 adds high-level strategy and collection depth with the introduction of Exotic rarity, the debut of Mega Hydra Karen, and impactful quality-of-life improvements.
Whether you’re going for the limited playtime reward or buying crates with Robux, now is the time to build a stronger team.
Use the event window to your advantage and don’t miss your chance to mint one of the game’s strongest units.