Spongebob Tower Defense Update 23 Guide – New Units, Codes & More!

SpongeBob Tower Defense just rolled out Update 23, and this one is packed with limited-time quests, powerful new units, and major gameplay improvements. If you’re looking to stay ahead, earn exclusive rewards, and unlock secret units, this guide breaks down everything you need to know. Also check out our Spongebob Tower Defense Tier List for new players.

New Temporary Unit: Bemmy Buddy & Permanent Rewards

One of the biggest highlights is the Bemmy Buddy questline. Once claimed, this temporary unit can be leveled up by simply playing the game — story mode, challenges, raids — all contribute to increasing its “Power of Friendship” level.

• Level 25: Unlock the permanent Normal version of Bemmy Buddy (delivered Tuesday at 10 AM CT)
• Level 50: Earn the Shiny WBO version
• Level 100: Get the Shiny WBO Five-Star with Neptune’s Crown

Don’t miss the Bemmy Buddy questline, which also rewards players with Canned Bread (5,000 XP per item) — double the XP of Pretty Patties. Completing all 9 quests gives you 4,550,000 XP in total, plus a Secret Chest Boost and the Bubble Taxi Mount.

New Raid Unit: Barnacle Man

With Captain Magma rotated out, the brand-new Barnacle Man is now available in the raid shop. You can unlock him in both normal and shiny forms, but remember — he’s exclusive to the raid shop and requires raid participation. Also, note that Dunes and Dragons and Bubble Bowl maps now rotate every 30 minutes, while Mermalair remains permanently available.

Refreshed Mr. Krabs Merchant Shop

Mr. Krabs’ merchant shop now refreshes every 15 minutes instead of 30. Offers are now global, meaning everyone sees the same deals. Occasionally, rare and exclusive items might appear such as:

• Shiny Mumbo Mythics
• Secret Units
• Secret Chests & Boosted Secret Chests

Check the shop often to grab high-value items before they’re gone.

Mermaid Man Limited Quest (Starting June 12)

Starting Tuesday, June 12 at 10 AM CT, Mermaid Man arrives with a fresh limited-time questline. These quests run for four weeks with new objectives released every Tuesday, Wednesday, and Thursday. Rewards include:

• Secret Chests
• Boosted Secret Chests
• Exclusive Mount: Invisible Boat Mobile
• Limited Unit: The Moth

Complete these weekly milestones to maximize your rewards before the event ends.

Beta Mobile Rewards System (Optional Ads)

A new optional ad-reward system is now available for mobile and tablet users aged 13+. Here’s how it works:

• Watch up to 10 short ads (15–30 seconds) per day
• Each ad gives you gems, coins, chests, and eventually an exclusive mount
• After claiming the mount, daily rewards switch to 100,000 XP worth of Canned Bread

This feature is completely free-to-play friendly, optional, and refreshes every 24 hours. It’s a smart way to earn more without spending Robux.

Active SpongeBob Tower Defense Codes Update 23:

• CANNEDBREADISGOOD

Make sure to redeem the latest codes Spongebob Tower Defense to grab free gems, coins, or exclusive units. These are usually time-limited and expire quickly with each update, so use them fast!

Update 23 of SpongeBob Tower Defense delivers one of the most generous content drops yet — from the collectible Bemmy Buddy and Barnacle Man, to a rotating raid system, free-to-play XP options, and weekly quests from Mermaid Man. Whether you’re a long-time player or just getting started, now’s the time to grind and grab those exclusive rewards before they’re gone. Stay tuned for more updates each Tuesday, and don’t forget to check the merchant shop every 15 minutes — you never know what rare item might pop up.