The Wormhole Opens is the 9th Cyclone Stage/the 5th limited Deadly stage. It introduces the Super Cosmic Cyclone, which is a non-Floating Cyclone like Zyclone, Divine CyclonePrimeval Cyclone, and Metal Cyclone. Upon completion, players have a 30% chance to unlock Volley Cat. It appears every Sunday.

This stage cannot be played until Cats of the Cosmos Chapter 1 has been cleared.


Super Cosmic Cyclone, a Starred Alien Cyclone spawns at the beginning of the level. About ten seconds later, the first peons begin to spawn, Shibalien Elite and Mistress Celeboodles. This pattern repeats as the battle progresses: Mistress Celeboodles every 4 seconds, Shibalien Elites every 20 seconds, Star Pengs every 26-36 seconds, and General GreGories every 13 seconds.


An ideal strategy to find your way past this stage is to try to slow the Super Cosmic Cyclone as much as possible. Slow down the Cyclone with slow or freeze effects. Weakening it can be worthwhile too because of the damage it inflicts being moderately low to begin with. In fact, if one uses Thaumaturge Cat, a level 40 Crazed Tank cat can endure 1 blow without being defeated. Also use stallers (use a tanky Uber like Mission Control Mekako if you need to) so you can inflict the effects.

Corrupted Psychocat is quite helpful in this stage. It can be used to easily stall the boss. Macho Leg Cat also works well due to its anti-Alien ability. On the Uber Rare side of the spectrum, Cat Machine Mk 3 is noteworthy due to its impeccable defense and Alien Resistance. However, it is not particularly good as it will be warped constantly. Megaphrodite is an incredibly potent long-ranged attacker, as is Catman. Because Super Cosmic Cyclone only has a range of 275, Thaumaturge can be used to slice its attack power in two. Oni Hayabusa gets a special mention as it can knockback and slow SCC, as well as the fact that when SCC has been hit by Thaumaturge, Oni Hayabusa can tank around 10 blows.

Warp Blocker cats will fare very well here as they will not be interrupted. However, if they are attacked they will quickly die as they will not be Warped to a safer distance. One good example is Rover Cat, only if it is hypermaxed. DO NOT USE SEAFARER CAT AS HE IS OUTRANGED.

Maxing out the anti-Starred Alien Treasures from Cats of the Cosmos Chapter 1 is highly recommended, or else the Super Cosmic Cyclone and its supports might be too powerful to deal with.

Strategy 1

All you need is Catellite and Freshman Cat Jobs. At the start of the battle, send 1 Catellite to stall SCC a bit. Lure the enemies to your base and then slaughter them. After that, let SCC hit your base, then spawn Freshman. SCC damage will be reduced to nothing and then shoot your cat cannon so SCC isn't hitting your base anymore. Let your debuffers and damage dealers (I used Akira and Immortal Shingen) to destroy SCC. Make sure to kill it before the Gregory arrive.


Walkthrough Video Player Notes
The Battle Cats - The Wormhole Opens (deadly) The 2nd Dimension No Uber

The Battle Cats - The Wormhole Opens (deadly) The 2nd Dimension No Uber

Danie A No uber are use in this video SilumanTomcat A level 40+23 Li'l Macho Legs Cat is used in this video. Dcyx This video uses two Metal Slug Defense units.


  • In BCEN, this stage's first occurrence should have taken place on Thanksgiving Day.
  • This is the first and only Deadly Cyclone Stage (not including the Deadly Carnival events).
  • The background in The Wormhole Opens is the same one that appears in Black Hole.
  • This stage used to count a limited Deadly stage like Realm of Carnage, since it lasts for 3 days and is a No Continues stage. In version 6.8, however, PONOS changed its schedule to every Sunday so it now shares the same schedule with Attack on Titanium.


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 StageXP Megablitz!XP ColosseumMerciless XP!
Catfruit Guerrilla Growing Green (IIIIII) • Growing Purple (IIIIII) • Growing Red (IIIIII) • Growing Blue (IIIIII) • Growing Yellow (IIIIII) • Growing Strange (IRedFloatingBlackAngelAlienMetalZombie) • Growing Epic (III) • Catfruit JubileeCatfruit Buffet
Material Guerrilla Cavern of Comets (IIIIII) • Island of Ash (IIIIII) • Strait of Wings (IIIIII)
Cyclone Stages
Solo Fights Expert Attack on R-CycloneAttack on B-CycloneAttack on W-CycloneOncoming Maelstrom
Insane Attack on TitaniumBlack Hole RisingOncoming StormUnholy Tempest
Deadly The Wormhole Opens
Merciless Charybdis' Mouth
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 (Insane)Space is the Place (Insane))
Advent Stages
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)
Tier 2 The Pure Land (Merciless)Saintly Sister (Merciless)I'll Be Bug (Merciless)Dogsville (Merciless)Last of the Dead (Merciless)Baby Fake (Merciless)
Crazed Cat 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 Awakens
Box Cats AwakenPanties AwakensNinja AwakensZombie AwakensSamurai Awakens
Sumo AwakensBoogie AwakensSkirt Awakens
Monthly Cats Adult Cat AwakesEvil Cat AwakesDoll Cats AwakeMaiden Awakes
Koi AwakensBride AwakensVacation AwakesVengeance Awakes
Kung-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 Too
Wrath of the DivineBitter IronyDimension of Delirium
The Dead Keep RollingThe 3rd Dimension
Advent Cats Clionel DominantRiver AcheronQueen's CondemnationDead by EncoreKing Wahwah's ReturnA Deeper Dream
Other Cats Tricycle AwakensCat Kart AwakensFlower AwakensNekondo AwakensCatburger Awakens
Monthly 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 of 50 Million!Golden Week Special!!
Region Restriction
Punchy PrizefighterSecret DelicacyFaster Than Fast FoodWe're Number OneCola Flavor Cat
Unknown Schedule
Dark Descent I: Eastern Cave • II: Western Walk • III: Southern Fort • ∞: Northern Crater
Seeing Red I: Sands of the East • II: Wastes of the West • III: Peaks of the South • ∞: Ruins of the North
Duel Stages VanguardEliteCommander
Tag Arena 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 10

Floor 11Floor 12Floor 13Floor 14Floor 15Floor 16Floor 17Floor 18Floor 19Floor 20
Floor 21Floor 22Floor 23Floor 24Floor 25Floor 26Floor 27Floor 28Floor 29Floor 30
Floor 31Floor 32Floor 33Floor 34Floor 35Floor 36Floor 37Floor 38Floor 39Floor 40
Floor 41Floor 42Floor 43Floor 44Floor 45Floor 46Floor 47Floor 48Floor 49Floor 50

Legend Quest LEVEL 1 - LAST LEVEL (randomized SoL stages & lineups)
Baron Seal Strikes Baron Seal Strikes!: Red Alerts 1~20 • Baron Seal Strikes!!: Red Alerts 21~40 • Baron Seal Strikes!!!: Red Alerts 41~60
Le'Grim Strikes Le'Grim Strikes!: Rampage Lv1~20 • Le'Grim Strikes!!: Rampage Lv21~40 • Le'Grim Strikes!!!: Rampage Lv41~60
Mega Menace Mega Menace!: On Mighty Wings Lv.1~20 • Mega Menace!!: On Mighty Wings Lv.21~40 • Mega Menace!!!: On Mighty Wings Lv.41~60
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 GalaxyAt Nintendo eShop!
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
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