OS Graveyard

0S Graveyard is the fourth stage of IT Catacombs, a straightforward boss after boss battle. Requires proper meatshielding to win.

Battleground

Professor A. appears after 2 frames.
Bun Bun Black appears after 26.7 seconds^800f
Teacher Bun Bun appears after 33.3 seconds^1000f
Because this stage only ever spawns 2 enemies at most, Teacher Bun Bun won't always appear at the time stamp, but he appears when either Professor A. or Bun Bun Black is defeated.

Strategies

Uber-less line up

Mohawk, Manic Mohawk, Eraser, Manic Eraser, Prisoner, Crazed Bahamut and Dark Emperor Catdam.

Demonstrated Video: [1]

Max up power up. Use meatshields to stall until you have enough to spawn Megaphrodite. Stall black Bunbun with Bombercat and meatshields till Megaphrodite kills Prof A. Have Necrodancer and any other cats which freeze flying enemies. Use Windy or A. Bahamut to finish.

Reference

http://battlecats-db.com/stage/s0040.html

Stories of Legend
The Legend Begins	Earthshaker • Return of Terror • Sunset Blues • Melancholy Damp • Bouncy Park • Gentle Smile • Guardian of the Ranch • Sleeping Lion
Passion Land	Nyandalucia • Paella Field • Flamenco Hole • Sangria River • Gazpacho Highland • Churros Night • Bone Dry Gardens • Tapas Desert
Glucosamine Desert	Chondroitin Sandhill • Sesamin Ruins • Isoflavone Cave • Catechin Hill • Lycopene Sunset • Propolis Oasis • Peptide Snowfield • Hyaluronan Mountain
Swimming Cats	Premature Launch • Deep Ocean Blue • Mermaid Cove • Chaos Lagoon • Playing Pirates • Fisherman's Dilemma • Seaweed Shallows • Salty is Seawater
Risqué Terrain	Lovely Minerals • Shapely Caverns • Enticing Tunnels • Squishy Hollows • Twin Peaks • Thriller Bridge
Western Street	Gunman's Dawn • Cowboy Haven • Wanted Night • Macaroni Town • Wandering Traveler • Disappointed Guard • Cowboy Mountain • Rodeo Night
Sea of Tuna	Red Tuna Coast • Fresh Wharf • Blue Ocean • Carapaccio Waters • Economic Sea • Tactical War Tuna • Frozen Tuna Front • Cave Fillet
Bamboo Island	Prickly Field • Bamboo Coast • Serial Killer Jungle • Disgusting Swamp • Dumpy Cave • Stardust Street • Mushroom Cliff • Frontier Spirit
Squishy Cave	Milky Tunnel • Fluffy Dark Weapon • Mural of the Devil • The Wind Blows • Juvenile Killer • Upset Rock • Flooded Cave • Chubby B. Goode
Volkanos Volcano	Hot Bath Rock • Gentle Geyser • Thick Magma • Fire Cage • Volcanic Defender • Flame Caldera
Neverending Cat Story	Potential Road • Gloomy Tree • A Song in the Wind • Philosophy Road • Frontier Bell • River of Tears • Shining Road • The Trial Deep
Castle of Fish	The Sea Whispers • Ripples Island • Octopus Sea • Poseidon Rest • Moonlight Beach • Coral Coral Reef • Ark of the Month • Killer Sardines
Sushi Island	Tuna Field • Crab Field • Salmon Cave • Sea Urchin Cave • Caviar Woods • Natto Bay • Halibut Forest • Shrimp Frontier
The Scratching Post	Cardboard Corridor • Catnip Dream • Crunchy Wall • Wading Woodchips • Crunchy Pillar • Disapproving Giant
Parthenon	Altar of Zeus • Sword of Achilles • Road of Eros • Dawn of Gaia • Gates of Aphrodite • Labyrinth of Hades
Low Tide Beach	Clammy Cove • Beached Mammals • Bikini Territory • Apple Bobbing Ocean • Parasol Field • Ancient One-Piece • Glassy Sands • Star Ocean
Alcatraz	Gull Coast • Pelican Island • Underground Base • Villains Jungle • Chicken Game • Cat Trial • Prison Prairie • Jailer in the Morgue
Jail Break Tunnel	Sin and Punishment • Prison Sentence • Harry Tunnel • Dead Falls • Pitfall Zone • The Great Escaper
Capone's Jail	Jailbreak Diary • Last Gang • Prison Destruction • King of Freedom • Liar's Fate • Pigpen Taboo
Silk Road	Gandara's Rest • Utopia is Over There • Godiego Pass • Monkey Magic • Outsider's Gate • Marco Po Road • Pig Swill • Imp's cold sweat
Stairway to Darkness	Safe and Not Sorry • Claustronyctophobia • Red Alert • Pitfalls of Life • Subtle Curfew • Underground
Prince of Darkness	The Red Carpet • The Bathroom • The VIP Room • Torture Room • Dictator's Garden • Satan's Bedroom
Dead End Night	Feast of Betrayal • Catharsis' End • Black Premonition • Broken Mask • Agape's Cage • Saint Red Fox
Battle Royale	Her Highness, Milk T. • Angry Fighting • The Horrible Song • Trap of Cowards • Dark Nemesis • Scent of Gore & Fish
Scars of War	Valkyrie Plains • Minefield • Kugel Schreiber • Muddy Trench • Sniper Jungle • Sunset Soldier • Father's Back • Winning Back
Sea Polluter	Oil Platform • Sweat and Aldehyde • Ancient Trial • I'm onto you • Littering Coast • Benzene Field • Government Watchdog • Revolving-door Floats
Body & Soul	Sunset's Howl • Gestalt, Decay • Warrior's Dawn • Cursed Blizzards • Sign of the Cat • Out of Despair • Metabolic Syndrome • Love and Death
Weak & Mildly Acidic	At Least I'm a Cat • Knights of the Round • Cat Catharsis • Beautiful Finale • No More Bad Dreams • Learned to Love
Intrepid Cats	Renewed Conflict • Mysterious Order • Birdwatching • Thorny Dialogue • Darkweb
Shadow Cosmopolis	Hungry Forest • Overachiever Central • Morning Rush Hour • Docking Massacre • Subterranean Stalker • Lord of the Abyss
Galapa-Goth	DNA & DHA • Twilight Poachers • Surviving Herd • Alien Ecology • Heavenly Creatures • Conservation Society
Kombu Cape	Rinrin Shelterbelt • Iberian Plains • Weeping Dunes • Golden Gai • Leadfoot Drive • Trouble at the Mansion
Axis of Evil	Pecking Order • Technocracy • Merciless Onslaught • Celestial Seas • Close Encounters • The Spy Who Pet Me
Suburbs of the Dead	Home Sweet Mausoleum • Swamp of Sacrifice • Dungeon of Dreams • Revenant Road • Ghostlight Gardens • Silenced Meowing
Quarantine Isles	Virus Smugglers • Bionic Seaweed • Ancestral Ways • High Watchtower • Tunafish Trenches • The Infected King
Mouseyland	Greeter at the Gates • Rickety Coaster • Virtual Nightmare • 50 Degrees Hotter • Irresistable Henhouse • The Haunted 1LDK
Walk of Fame	Paparazzi Paradise • Gossip Rags • Beverly Hills Scoop • Lovechild Lane • Saucy Scandals • Multiversal Studios
Cutpurse Coast	Swim Meet • Sea Breeze Salon • Deep Sea Dying • Procrastinator Parade • Grand Exhibition • No Return Flights
Above & Below	Electric Bath • Boiling Spring • Mineral Treatment • Soap Scum • The Sauna Crew • Steamed to Death
Windless Island	Narrow Docks • Romantic Highway • Drunken Backrub • Gulag of Love • Perfume Room • Houses of the Holy
IT Catacombs	Caliban's Keeper • Dial-Up Dreams • Throne of Phone • OS Graveyard • The Holy Exploit • Broadband Omens
Grotesque Gallery	Cubist Crimes • Surrealist Sins • Gouache Ghouls • Death by Dada • Baroque Beasts • Atrocious Deco
Area 22	Roswell Incident • Cat Abduction • Adamski Type • Chupacabra Love • Tunguska Event • Offworld Weary
Beyond the Savannah	Eat the Weak • Nikumanjaro • The Noble Tribe • Dry Season • Electrosafari • Heaven's Oasis
Blizzard Boulevard	Shiver Junction • Leaky Tunnel • Frostbite Park • Toasty Turnpike • Sleepy Signals • Scorched Tollbooth
Singularityville	Ubiquitous Sales • Virtual Harvest • Wearable Homes • 8K Fertilizer • Blockchain Twilight • Haunted Genome
Ends of the Earth	Ultimate Shrine • Valley of the End • Final Tower • Last Labyrinth • Cave Conclusion • Apocalypse Temple
The Legend Ends	A Day of Reckoning • Thirst for Vengeance • Glory of Glories • A Moment of Serenity • False Resurrection • Goblet of the Oath • Twilight Zephyr • Unkept Promises
Laboratory of Relics	Eldritch Forces (Invasion)

OS Graveyard

Contents

Battleground

Strategies

Uber-less line up

Reference

Fan Feed