Rare Cats

Rare Cats are a type of Cat Unit. Some of them can be unlocked by playing the Rare Cat Capsule while others appear as an item drop in special events.

Rare Cat Capsule Cats

Anti-Red

Viking Cat^{strong against} → Thor Cat → Maximum the Fighter
Swordsman Cat^{massive damage} → Sword Master Cat → Elemental Duelist Cat
Witch Cat^slow → Sorceress Cat → Enchantress Cat
Pirate Cat^knockback → Captain Cat → Dread Pirate Catley

Anti-Floating

Archer Cat^{massive damage} → Cupid Cat → Cataur
Mer-Cat^{strong + survive} → Commando Cat → Cameraman Cat
Bishop Cat^slow → Monk Cat → Sanzo Cat
Fortune Teller Cat^knockback → Fisherman Cat → Doctor Cat
Shaman Cat^freeze → Necromancer Cat → Necro-Dancer Cat

Anti-Black

Cat Gunslinger^slow, → Cat Eastwood → Rodeo Cat
Tin Cat^knockback → Plane Cat → Robocat

Anti-Metal

Jurassic Cat^critical → Jurassic Cat Sitter → Catasaurus

Anti-Angel

Rocker Cat^resistant → Artist Cat → Ramen Cat
Stilts Cat^knockback → Totem Cat → Acrobat Cats

Anti-Alien

Psychocat^slow → Neo Psychocat → Corrupted Psychocat
Wheel Cat^{massive damage} → Solar Cat → Chill Cat
Rover Cat^{strong against} → Rover Cat Mk II → Catellite

Anti-Zombie

Gardener Cat^freeze → Lumbercat → Weedwacker Cat
Welterweight Cat^knockback → Heavyweight Cat → Ectoweight Cat

Miscellaneous

Pogo Cat → Masai Cat → Jiangshi Cat
Salon Cat → Paris Cat → Cyborg Cat
Thief Cat → Phantom Thief Cat → Goemon Cat
Onmyoji Cat → Magica Cat → Thaumaturge Cat

Monthly Event Cats

Anti-Red

Adult Cat^{strong against} → Sick Cat → Prisoner Cat (January Event)
Evil Cat^freeze → Gentleman Cat → Gentleman Bros. (February Event)
Koi Cat^{strong against} → Gross Koi Cat → Kiss and Koi (May Event)
Vacation Queen^{strong against + knockback} → Office Lady Cat → Call Center Cat (July Event)
Maiden Cat^{strong against} → Sportsgirl Cat → Wrestling Cat (April Event)
Salaryman Cat^{strong against} → Grudge Cat → Ritual Cat (November Event)

Miscellaneous

Doll Cats → Cat-o-tron → Nyalladin (March Event)
Madam Bride → Madam King → Madam the Savannah (June Event)
Vengeful Cat^{zombie killer + long distance} → Groucho Cat → Kite Cat (August Event)
Kung Fu Cat X → Drunken Master Cat X → Iron Claw X (September Event)
Sports Day Cat → Kidnapper Cats → Rampage Cats (October Event)
Reindeer Fish Cat → Sashimi Cat → Xmas Pudding Cat (December Event)

Celebration/Annually Event Cats

Fixed Schedule

Marshmallow Cat, which upgrades to Creepmallow (Valentine's Day Event)
Pumpcat, which upgrades to Cat O'Lantern (Halloween Event)
A Gift of Cats, which upgrades to Cat's Gift (Christmas Event)
Awa-Odori Cat, which upgrades to So-ran Cat (Awa-Odori Event)
Food Stall Cat, which upgrades to Delivery Cat (A Cultured Festival)
Killer Cat, which upgrades to True Killer Cat (Cat's Day Event)
Eggy Cat, which upgrades to Easter Cat (Easter Event)
Slug Jockey Cat, which upgrades to Slugcat (Rainy Season Event)

No Fixed Schedule

Cat Kart R → Cat Kart L → Cat Kart P (The Battle Cats POP!)

Cyclone Stage Rewards

They are all anti-Metal units:

Space Cat^critical → Major Space Cat → Space Marine Cat (Crimson Catastrophe)
Bronze Cat^knockback → Michelangelo Cat → Quizmaster Cat (Heaven of Darkness)
Rope Jump Cat^{critical + resistant} → Pair Rope Jump Cat → Noodle Cats (Peerless)
Clockwork Cat^slow, → Puppetmaster Cat → Puppetmaster & Charley (Wrath of Heaven)
Hoop Cat^freeze → Showoff Cat → Hoopmaster Cat (Sweet Irony)
Drumcorps Cat^weaken → Banner Cat → Mochi Cat (Dimension of Despair)
Volley Cat^critical, which upgrades to Ballet Cat (The 2nd Dimension)
Primordial Cat^resistant, which upgrades to Modern Cat (Typhoon Nemo)