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]

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