SpongeBob Tower Defense Quests and Secret Units Guide

SpongeBob Tower Defense quests are structured objectives that award gems, crate rolls, trait items, and exclusive units across different game modes. While standard Daily and Weekly quests refresh on set timers, the game also features multi-step secret storylines, seasonal expeditions, and demanding achievement milestones that require specific team compositions.

Quest Categories and Reset Timers

The quest interface in the game lobby categorizes tasks into four distinct systems, alongside permanent achievements:

Weekly quest crates offer a chance at high-rarity drops such as Sour Note (2.5% drop rate) or mounts like the Electric Wheelchair, while challenge completions reward tokens used in the Challenge Shack.

The Secret Divine Quest: How to Unlock Boys Who Cry

The Divine quest is a multi-stage secret quest line that unlocks the Divine Castle lobby and awards the divine-rarity unit Boys Who Cry (featuring the Encore skill), as well as Birthday Pearl.

Step 1: Craft the Mysterious Key

To open the sealed door located to the left inside the Prestige Cave, you must collect three key fragments:

1. Fragment 1 (Middle Ages): Drops from the Middle Ages raid (5% drop rate).
2. Fragment 2 (Goo Lagoon): Drops from the rotating Goo Lagoon challenge stage (5% drop rate).
3. Fragment 3 (Kamp Koral): Drops from Kamp Koral Level 10 (approximately 3.3% to 5% drop rate).

Once all three fragments are in your inventory, open the Crafting menu and assemble the Mysterious Key. Return to the Prestige Cave, approach the door on the left, and interact to unlock Pearl's room.

Step 2: Pearl's Music Disc and Shiny Object

Speaking to Pearl initiates two item-retrieval steps:

1. Music Disc: Pearl asks for something to play music. Clear Krusty Krab Chapter 10 (3.3% drop rate) to obtain the Music Disc, then return to Pearl.
2. Shiny Object: Pearl requests a regal gift. Enter Tower of Karate and progress through the floors. The shiny item drops as a floor clear reward (0.25% on regular floors, up to 1% on floor 50 and above). Delivering this item awards the Birthday Pearl unit.

Step 3: Collect and Arrange the Band Members

Pearl then asks you to assemble the band Boys Who Cry. You must acquire four specific units:

• Squid Boy: Obtained from the Premium Dice summon (10% pull rate).
• Green Boy: Farmed from Rock Bottom Chapter 10.
• Blue Boy: Drops from the Mrs. Puff's Boating School rotating challenge stage.
• Orange Boy: Farmed from the Bubble Bowl raid (5% drop rate).

Take the four units to the stage in Pearl's chamber and interact to arrange them in the exact order:

• Front: Squidward (Squid Boy / Director)
• Left: Blue Boy
• Right: Orange Boy
• Back: Green Boy

Setting them correctly triggers their stage performance. Speak with Pearl to complete the quest, which activates the teleport pad to the Divine Castle. In the castle lobby, players claim their serialized Boys Who Cry unit, unlock the Divine Crate crafting station, and gain access to Divine Crafting for Superstar variants.

Long-Chain Expedition Quests: Level Up With OLIPOP

Long-running event quest lines, such as the Exotic Expedition / Level Up with OLIPOP series, require sequential completion of content to earn Relic pieces. Collecting all pieces unlocks the Prehistoric Gary unit and mount.

1. Story Mode Stages: Clear designated chapters on Davy Jones (or Nightmare) difficulty: 5 chapters of Conch Street, 5 chapters of Krusty Krab, 5 chapters of Sandy's Tree Dome, and Chapter 10 of Rock Bottom.
2. Challenge Stages: Clear Christmas Conch Street, Patty Vault, Flying Dutchman's Ship, and Goo Lagoon on Davy Jones difficulty as they appear in rotation.
3. Raid Stages: Clear Mermalair, Bubble Bowl, Dunces and Dragons on Davy Jones difficulty, followed by any raid on Davy Jones difficulty with two or more players in the party.
4. Tier 5 Boss Battles: Earn 3 stars on Tier 5 Bubble Bass (defeat in under 3 minutes using Rare or worse units), Tier 5 Dirty Bubble (same restrictions), Tier 5 DoodleBob (same restrictions), and Tier 5 Flying Dutchman (defeat in under 3 minutes using Epic or worse units).
5. Rogue Mode Milestones: Reach Wave 150, Wave 300, Wave 300 using Secret or worse units, and Wave 300 with 4 Cursed Cards active.

After completing all milestones, speak with the event NPC or claim the items from your inventory to receive Prehistoric Gary.

Solving Difficult Achievement Quests

Quest 16: Team Tactics (34 Units Placed)

Quest 16 requires winning 3 challenge matches while having exactly 34 units placed on the map. Because higher-rarity units have strict placement limits (often capped at 2 to 4), achieving 34 placements requires exploiting common and uncommon caps:

• Standard Common units (SpongeBob, Patrick, Sandy, Squidward) have an individual placement cap of 6. Four Commons provide 24 total units (4 × 6 = 24).
• The Common Gary unit has a reduced placement cap of 4, making it mathematically impossible to reach 34 if Gary is in your lineup.
• Uncommon units carry a placement cap of 5 each. Equipping two Uncommon units adds 10 placements (2 × 5 = 10).
• The Required Lineup: Common SpongeBob, Common Patrick, Common Sandy, Common Squidward, plus any two Uncommon units (24 + 10 = 34).

Because an army of low-rarity towers cannot output enough damage to clear endgame challenge stages, the tested strategy is to queue into Hard mode with a friend or an alternate account carrying high-tier damage units. Place all 34 low-tier units while your teammate eliminates the waves.

Bikini Bottom PD: Wave 300 with 5 Cursed Cards

Unlocking the Bikini Bottom PD unit via achievements requires reaching Wave 300 in Rogue Mode while holding at least 5 Cursed Cards.

• Cursed cards appear at random intervals (roughly every 15 to 30 waves) alongside standard buff cards.
• Because Cursed Cards apply harsh penalties (such as disabling unit slots, lowering range, or reducing upgrade efficiency), focus on raw single-target or pierce units like Muscle Bob or high-damage Exotics that remain functional even when stat-drained.
• Complete all 300 waves to satisfy the achievement condition and claim the unit.

Mustache Man Mythic Achievement

The "Mustache You a Question" achievement rewards the Pierce-type Mythic unit Mustache Man. To satisfy its conditions:

• Accumulate 100,000 enemy takedowns.
• Evolve 6 unique Mythic units to Superstar status (requires fusing six 5-star copies of a specific Mythic with green coins). Duplicate copies of the same Mythic do not provide credit for the unique requirement.

Limited-Time Event Quests

The Hunt: Mega Token Quest

During Roblox's The Hunt event, players can obtain an exclusive Mega Token by following a multi-map puzzle:

1. Join the event stage Bikini Bottom - Chumageddon and clear all 15 waves.
2. Re-enter the stage and search the ground for red "X" dig spots. Digging them up eventually yields a map of the Flying Dutchman's ship.
3. Return to the main lobby, speak to the Flying Dutchman near the Trading hub, and board his ship.
4. Jump down the grate at the rear of the ship into the lower deck. Collect the key located between barrels in the back-left corner.
5. Enter the doorway and navigate the maze: turn right, take the first right at the crossroads, go straight and right past the blue plant, turn left, head straight past the fish tank, and take the second right to reach the Captain's Quarters.
6. Step on the red teleport pad to start a 20-wave event match.
7. After the match concludes, check the room below the ship's helm to find a second map pointing toward City Hall.
8. Replay the Chumageddon stage, locate the small purple cave to the right of City Hall, walk behind the waterfall onto the token platform, and enter /e dance into the chat box to unlock the door to Davy Jones' Locker where the Mega Token rests.

Casual Easter Egg Hunt

The Casual Easter Egg Hunt involves finding 20 eggs hidden across maps without needing to beat the waves:

• Pineapple Egg: Conch Street, on top of SpongeBob's pineapple house.
• Jelly Egg: Jellyfish Fields, floating in a bubble near the purple jellyfish statue.
• Fried Egg: Krusty Krab, on the table in front of the diner entrance (after checking decoys).
• Rotten Egg: Chum Bucket, inside the wall ventilation opening to the left of the kitchen entrance.
• Synthetic Egg: Sandy's Treedome, rolling under the picnic table to the left of the entrance.
• Void Egg: Rock Bottom, on the coral reef next to the Flying Dutchman's ship.
• Junior Egg: Kamp Koral, on the porch of the Kamp Direktor building.
• Royal Egg: Atlantis, atop a tower next to a large rock overlooking the center building.
• Reef Egg: The Reef Retreat lobby, disguised as a rock surrounded by corals near the Index.
• Frozen Pineapple Egg: Christmas Conch Street, behind the coral tree near the anchor and rocks.
• Tanned Egg: Goo Lagoon, sitting on a beach chair under a parasol to the right of the waterfall.
• Fighter Egg: Karate Island, jumping onto the "Power Up!" poster near the "How to Play" board.
• Licensed Egg: Mrs. Puff's Boating School, behind the main school building wall.
• Ghostly Egg: Flying Dutchman's Ship, under the upper deck ship wheel.
• Secret Egg: Patty Vault, in the left corner behind Squidward.
• Doubloon Egg: Trading Hub, behind the barrels to the right of the ship entrance door.
• Prized Egg: Bikini Bottom, resting directly in front of City Hall's entrance.
• Band Egg: Bubble Bowl raid, on the center stage next to Pearl (requires level 25).
• Dragon Egg: Middle Ages raid, by the small house with the bowling ball (requires level 25).
• Heroic Egg: Mermalair raid, floating near a rock where SpongeBob and Patrick stand (requires level 25).

Collecting all 20 eggs unlocks the Egg Cart Mount.

SpongeBob Tower Defense Quests FAQ

Why did Quest 16 fail to register after I placed 34 units?

You must equip four base Commons (SpongeBob, Patrick, Sandy, Squidward) and two Uncommons to hit 34 total placements (4 × 6 + 2 × 5 = 34). If you equip Common Gary, his 4-placement cap drops your maximum to 33, preventing the quest condition from being met. Additionally, you must complete the match with a win on all three attempts.

Can Divine units like Boys Who Cry be traded?

No. Units obtained directly through the Divine Castle quest line, such as Boys Who Cry and the Green Boy band member, cannot be placed into trading windows.

What is the fastest method to grind Stardom points after finishing event quests?

Clearing Rock Bottom Chapter 1 on Davy Jones difficulty awards 35 points per run (taking approximately 1 minute and 16 seconds). While Boss Battles award 5 points per run in roughly 4 seconds, post-match reward animations and lobby reloading make Rock Bottom 1 significantly more time-efficient.