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Puffer Planet (Merciless) is an Advent Stage appearing on the 13th, 14th, 27th, and 28th of every month. When clearing this stage, the player has a chance to unlock Mightycat. Unlike other Advent Stages, it is only unlocked after clearing Chapter 2 of Cats of the Cosmos. This is a No Continues stage.


  • 1 Puffsley's Comet spawns as the boss after 20 seconds600f.
  • 3 Corporal Weylands spawn after 50 seconds1,500f, delay 40~50 seconds1,200f~1,500f.
  • 1 Project A spawns after 80 seconds2,400f.
  • 4 Star Pengs spawn after 26.67 seconds800f, delay 16.67~20 seconds500f~600f.
  • 4 Star Pengs spawn after 100 seconds3,000f, delay 13.33~16.67 seconds400f~500f.
  • 4 Star Pengs spawn after 160 seconds4,800f, delay 10~13.33 seconds300f~400f.
  • 4 Star Pengs spawn after 206.67 seconds6,200f, delay 40~50 seconds1,200f~1,500f.


Due to the massive buffs on the Starred Aliens (particularly the Star Pengs), it is highly recommended if not outright required to have all anti-Starred Alien Treasures before attempting this stage. Even missing one Treasure set will lead to each Star Peng having 672,000 health and 36,000 attack power, making them nigh-unbeatable without a cheese strategy or certain Uber Rare Cats.

The Enigma Fruit Treasures also help greatly, allowing Chill Cat and other units with massive damage to Aliens to deal up to 33% more damage (Chill Cat's Cost Down Talent is mandatory) and to allow Catellite to barely survive Puffsley's Comet's attack if upgraded to level 40. Speaking of which, Catellite is one of your best friends here, being able to absorb 3~5 Star Peng hits depending on level. Use it with Manic Eraser Cat as meatshields. Can Can Cat and Maglev Cat are also great damage units, with Maglev being able to rush forward and hit twice when warped.

There are 3 main ways to play this stage:

  1. Survive and kill the 12 main Star Pengs using Catellite Cat, Chill Cat, Can Can Cat and Maglev Cat, then finish off the supporting enemies. Shown in the first video under "Walkthrough".
  2. Cheese the stage using Healer Cat CC. Shown in the second video.
  3. Use Awakened Bahamut Cat or one of the Ubers listed below to lure and kill / severely damage Puffsley's Comet, making the stage much easier.

Recommended Ubers

The following Uber Rares are good for this stage, and if you have any of these, using them will make things easier.

  • Bazibon: Bazibon has exceptional offense and defense against Aliens, allowing it to both lay a dent in Puffsley as well as soak up some hits. Make sure to keep it at a distance from the Cat Base, as Puffsley's Comet's Omni Strike may still hit said base.
  • Aphrodite: The classic Alien nuker. She can make quick work of Puffsley's Comet as well as control a ton of the Alien support. Be careful to stall Puffsley's Comet so he doesn't enter Aphrodite's blind spot.
  • Tesalan Pasalan: Fully outranges Puffsley's Comet can turn the fish into a pancake in record time. Beware his single target, however, as you must clear out enemies from his way to target Puffsley, else the Star Pengs might push you into a bad position. One of the best units to use in this stage.
  • Mad Doctor Klay: Attacks only Aliens in an Alien-only stage. Make sure to not trigger Puffsley's Comet's knockback and reset his attack. While Klay might not be able to solo Puffsley, he definitely makes dealing with Puffsley and the support much easier.
  • Ganglion: Deals massive amounts of damage to all Aliens present here, as well as being able to hit the backline with his Long Distance if positioned correctly. He can easily abuse the Warp and Knockback effects of the enemies to attack again and again. Just make sure to watch your money before you send him out.


Video Player Notes

The Battle Cats - Blue Impact, Puffer Planet (aka Star Peng purgatory)

Lucas IV A Rich Cat is used in this video.

Battle Cats - Puffer Planet (Puffsley’s Comet) - No Gacha CHEESE ft. Healer Cat

Xskull & Dr. Skull Rich Cat, high-level units.



  • This stage was altered in Version 9.1. Before the update:
    • Puffsley's Comet spawned after 10 seconds;
    • Project A spawned after 1 minute;
    • The first wave of Star Pengs appeared after 3.3 seconds and had a delay of 20-23.3 seconds between each Star Peng;
    • The second wave of Star Peng appeared after 90 seconds and had a delay of 16.7-20 seconds between each Star Peng;
    • The third wave of Star Pengs appeared after 163.3 seconds and had a delay of 13.3-6.7 seconds between each Star Peng;
    • The final wave of Star Peng appeared after 223.3 seconds and had a delay of 33.3-40 seconds between each Star Peng.
  • For all intents and purposes, Puffer Planet is treated as a Deadly stage, despite being tagged as Merciless.
    • The event poster (shown above) says, "Deadly Stage!"
    • It is the only Merciless Advent Stage to award a gold Meow Medal rather than platinum.
    • The star difficulty after 10.7 is ★9 like the Deadly Advent Stages, rather than ★10 like the Merciless ones.
    • It was the only Merciless Advent Stage to be part of the limited Catnip Challenges that involved beating Advents with restrictions.
    • Puffsley's Comet is the only Merciless Advent Boss to appear in Heavenly Tower, which otherwise only contains the Deadly Advent Bosses.
  • The name Blue Impact may be reference to the movie Deep Impact as they have similar names and for the fact that the movie features a meteorite which is very reminiscent of Puffsley's Comet.


Special Stages
Daily Stages
Normal Stages Monday Stage (Rich Cat) • Tuesday Stage (Speed Cat) • Wednesday Stage (Cat Jobs) • Thursday Stage (Sniper Cat) • Friday Stage (Helpful Cat) • Weekend Stage
Blitz Stages Monday Blitz StageTuesday Blitz StageWednesday Blitz StageThursday Blitz StageFriday Blitz Stage
Guerrilla Stages
Cat Ticket Guerrilla Love, Metal Hippoe (Hard)Super Metal Hippoe (Expert)Steel Visage (Deadly)Forged to Kill (Deadly)
XP Guerrilla XP Stage/Weekend StageXP Megablitz!XP ColosseumMerciless XP!The Proving Grounds (First Round (Easy)First Round (Expert)First Round (Deadly))
Catfruit Guerrilla Growing Green (IIIIII) • Growing Purple (IIIIII) • Growing Red (IIIIII) • Growing Blue (IIIIII) • Growing Yellow (IIIIII) • Growing Strange (IRedFloatingBlackAngelAlienMetalZombie) • Growing Epic (III) • Growing Evil (IIIIIIIV) • Catfruit JubileeCatfruit Buffet
Material Guerrilla Cavern of Comets (IIIIII) • Island of Ash (IIIIII) • Strait of Wings (IIIIII)
Enigma Guerrilla Isle of the Map Lord (IIIIII)
Cyclone Stages
Solo Fights Attack on R-Cyclone (Expert)Attack on B-Cyclone (Expert)Attack on W-Cyclone (Expert)Oncoming Maelstrom (Expert)Attack on Titanium (Insane)Black Hole Rising (Insane)Oncoming Storm (Insane)Unholy Tempest (Insane)The Wormhole Opens (Deadly)Charybdis' Mouth (Merciless)Wrath of Hell (Deadly)
Dual Fights Bad to Worse (Tragedy in Red (Insane)Doom Paradise (Insane)) • Day of Judgement (Explosion in the Sky (Insane)Acts of Cat-God (Insane)) • Techneurosis (Nuts 'n' Bolts (Expert)Space is the Place (Insane))
Advent Stages
Solo Fights Tier 1 No Plan A (Deadly)Realm of Carnage (Deadly)Honey Trap (Deadly)Parade of the Dead (Deadly)N-1 Grand Prix (Deadly)Bombergirl (Deadly)Puffer Planet (Merciless)Flow Like the Stream (Merciless)Possessed by Evil (Merciless)Aku Reincarnation (Merciless)
Tier 2 The Pure Land (Merciless)Saintly Sister (Merciless)I'll Be Bug (Merciless)Dogsville (Merciless)Last of the Dead (Merciless)Baby Fake (Merciless)
Dual Fights The Angel & The Demon (No Plan A (Deadly)Realm of Carnage (Deadly)) • The Queen & The Dead (Honey Trap (Deadly)Parade of the Dead (Deadly)) • The King & The Maiden (N-1 Grand Prix (Deadly)Bombergirl (Deadly)) • The Dead & The Bloated (Parade of the Dead (Deadly)Puffer Planet (Merciless)) • The Queen & The Maiden (Honey Trap (Deadly)Bombergirl (Deadly)) The King & The Angel (N-1 Grand Prix (Deadly)No Plan A (Deadly))
Crazed Stages
Crazed Cats Dark Souls (Insane)Absolute Defence (Insane)Berserk (Insane)Festival Gross (Insane)Head Shaker (Insane)Flappy Cat (Insane)Fish Hell (Insane)Mammals? (Insane)Crazy Cats (Insane)
Manic Cats Deathhawk (Deadly)Vulcanizer (Deadly)Unjust War (Deadly)Muscle Party (Deadly)Lots O' Lion (Deadly)Forest Beasts (Deadly)Ogre Island (Deadly)Draconian (Deadly)Resident Feline (Deadly)
Clan of the Maniacs The Wild Dance (Deadly)Insane Rhythms (Merciless)
Awakening Stages
Buyable Cats Actress AwakensKung-Fu AwakensMr. AwakensBondage AwakensThe Dom AwakensBox Cats AwakenPanties AwakensNinja AwakensZombie AwakensSamurai AwakensSumo AwakensBoogie AwakensSkirt Awakens
Monthly Cats Adult Cat AwakesEvil Cat AwakesDoll Cats AwakeMaiden AwakesKoi AwakensBride AwakensVacation AwakesVengeance AwakesKung-Fu X AwakensSports Day AwakensSalaryman AwakesReindeer Fish Awakens
Li'l Cats Tiny Meows (Deadly)Tiny Will (Deadly)Tiny Chopper (Deadly)Tiny Creeper (Deadly)Tiny Horns (Deadly)Tiny Wings (Deadly)Tiny Fins (Deadly)Tiny Tail (Deadly)Tiny Fists (Deadly)
Cyclone Cats Crimson VengeanceNEO Darkness HeavenPeerless TooWrath of the DivineBitter IronyDimension of DeliriumRed Sky At NightThe Dead Keep RollingThe 3rd Dimension
Advent Cats Clionel DominantRiver AcheronQueen's Condemnation Dead by EncoreKing Wahwah's ReturnA Deeper DreamCourts of Agony
Other Cats Tricycle AwakensCat Kart AwakensFlower Cat Awakens!Nekondo AwakensCatburger Awakens
Event All-Stars Stages
Special Thanks! (Insane)Ultra Stress! (Insane)Miracle Tactics! (Insane)Wonderful Conquest (Insane)Elite Corps (Insane)Megaton Blast (Insane)Presents of Mind (Insane)
Memorial Stages
Year's First Dawn • Happy Birthday (IIIIII) • Grats! 3 Years!!Joy of 20 Million!Joy of 30 Million!Joy of 40 Million!CAT DAYYear of the RatJoy & ProsperityJoy of 50 Million!Joy of 60 Million!Joy of 70 Million!Golden Week Special!!Joy of 60 Million!Q1. Box of Contents QuizQ5. Time Luck QuizHappy Chinese New Year Present!
Region Restriction
Punchy PrizefighterSecret DelicacyFaster Than Fast FoodWe're Number OneCola Flavor CatWafer Cat Advent
Unknown Schedule
Dark Descent I: Eastern Cave • II: Western Walk • III: Southern Fort • ∞: Northern CraterCover of Darkness
Seeing Red I: Sands of the East • II: Wastes of the West • III: Peaks of the South • ∞: Ruins of the North烈火の乱
Duel Stages Duel on the Prairie (VanguardEliteCommander) • Duel at Sunset (VanguardEliteCommander) • Duel Under the Stars (VanguardEliteCommander) • Duel on the Dunes (VanguardEliteCommander) • Duel at the Lava Fields (VanguardEliteCommander) • Duel Under the Sea (VanguardEliteCommander)
Tag Arena Rookie (QuarterfinalsSemifinalsFinals) • Beginner (QuarterfinalsSemifinalsFinals) • Adept (QuarterfinalsSemifinalsFinals) • Pro (QuarterfinalsSemifinalsFinals) • Expert (QuarterfinalsSemifinalsFinals)
Total Wars Spring Special (BasicStandardAdvancedExaltedSupreme) • Summer Special (BasicStandardAdvancedExaltedSupreme) • Fall Special (BasicStandardAdvancedExaltedSupreme) • Winter Special (BasicStandardAdvancedExaltedSupreme)
Deadly Carnival Tornado Carnival (Deadly)Awakened Carnival (Deadly)
Deadly Carnival II Tornado Carnival II (Deadly)Awakened Carnival II (Deadly)
Deadly Carnival III Tornado Carnival III (Deadly)Awakened Carnival III (Deadly)
Heavenly Tower Floor 1Floor 2Floor 3Floor 4Floor 5Floor 6Floor 7Floor 8Floor 9Floor 10Floor 11Floor 12Floor 13Floor 14Floor 15Floor 16Floor 17Floor 18Floor 19Floor 20Floor 21Floor 22Floor 23Floor 24Floor 25Floor 26Floor 27Floor 28Floor 29Floor 30Floor 31Floor 32Floor 33Floor 34Floor 35Floor 36Floor 37Floor 38Floor 39Floor 40Floor 41Floor 42Floor 43Floor 44Floor 45Floor 46Floor 47Floor 48Floor 49Floor 50
Legend Quest LEVEL 1 - LAST LEVEL (randomized SoL stages & lineups)
Citadels Floor 1Floor 2Floor 3Floor 4Floor 5Floor 6Floor 7Floor 8Floor 9Top Floor
Infernal Tower Floor 1Floor 2Floor 3Floor 4Floor 5Floor 6Floor 7Floor 8Floor 9Floor 10Floor 11Floor 12Floor 13Floor 14Floor 15Floor 16Floor 17Floor 18Floor 19Floor 20Floor 21Floor 22Floor 23Floor 24Floor 25Floor 26Floor 27Floor 28Floor 29Floor 30
Gauntlet Stages
General Baron Seal Strikes Baron Seal Strikes: Red Alerts 1~20
Le'Grim Strikes Le'Grim Strikes: Rampage Lv1~20
Mega Menace Mega Menace: On Mighty Wings Lv1~20
Horrorpotamus Horrorpotamus: Cosmic Juggernaut Lv.1~20
Divine Archangel Strikes Divine Archangel Strikes: Blessing Lv.1~20
Big Peng Z Strikes Big Peng Z Strikes: Wandering Lv.1~20
Seasonal A Colossal New Year!A Colossal Valentine'sSuffering Spring!Summer Break CatsA Colossal New Year! (2021)Festival Nyanko ~Chinese New Year Edition~Horde of CatsAttack of the Lonely HeartsSeason 1: School DaysMonthly Event All-Stars Grateful Gathering
Monthly January GauntletJanuary Gauntlet IIFebruary GauntletFebruary Gauntlet IIMarch GauntletMarch Gauntlet IIApril GauntletApril Gauntlet IIMay GauntletMay Gauntlet IIJune GauntletJune Gauntlet IIJuly GauntletJuly Gauntlet IIAugust GauntletAugust Gauntlet IISeptember GauntletSeptember Gauntlet IIOctober GauntletOctober Gauntlet IINovember GauntletNovember Gauntlet IIDecember GauntletDecember Gauntlet II
Other Special Stages
The Battle Cats POP! Poppin' in 3D!Fight your Friends!Player VS PlayerPay Only Once!No I-A-P!Get Those UbersConquer the GalaxyBut the App's Fun Too :)
Mystery Package Sender Unknown
BitSummitBCJP Only Held in Miyako Messe! (2016)Held in Miyako Messe! (2017)Held in Miyako Messe! (2018)One more thing... (2018)Held in Miyako Messe! (2019)One more thing... (2019)
The Battle Cats Together! Play Battle Cats Together!Team Up & Win!Over 350 Cats!Play All You Want!Legend Stages Too!Minigames Galore!At the Nintendo eShop!But the App's Fun Too :)
Most Defeated 2019 Surprising #5Not Uncommon #4As Expected #3Runner-Up #2Unbelievable #1Unseen in 2019
Most Appearances 2020 Congrats on #5#4 As ExpectedSomehow #3#2 Out of Nowhere#1 Thanks to You!No New Appearances
Top 5 Most Seen Enemies, 2021! #5 Sliding#4 Blushing#3 That's Right#2 Good Try#1 Triple CrownUnseen
Empress' Research Arcane ConfluenceServant of DarknessDemon's ParkWicked CatWicked TankWicked Axe
Empress' Report Empress' Report 1Empress' Report 2Empress' Report 3Empress' Report 4Empress' Report 5
Empress' Excavation Empress' Excavation 1
New Year's Bling Long-Awaited GiftsToday Only: SociableWhere's My Money, Mom?Brotherly Income GapIncreasing SumsGifting BurdenGrandpa's LetteringNo Gift This Year
From From Your JuniorFrom Your SenpaiFrom A Childhood Friend
Season 2: Heartbeat Festival No Sleep For DaysCafe CoworkersHands on the CheckMiscalculated BillDay's End ChimeSchool Festival Cleanup
Season 3: Field Trip Long-Awaited TripImpulse SouvenirOut-of-Season BloomThe Great Pillow FightIn-Flight SlumberSudden Call From Your Crush
Weekend: Confession Weekend: ConfessionWeekend: ConfessionWeekend: Confession
Season 4: Graduation Day Waiting at the SpotRising Heart RateShe Actually Came?!One Brave StepScattered SakuraMoral SupportUnheard ConfessionNo Longer Single?