Ogre Island (Deadly)

Ogre Island is a special stage available on the 21st of every month and the first day of Crazed Festival if the player has previously completed all Crazed Cat stages. Completing this stage unlocks the True form of Crazed Fish Cat. Using Cat Food to continue the battle is not allowed in this stage.

Battleground

At the beginning, one Manic Island Cat is sent, with many Crocos as support. Soon after, 3 Manic Islands and a few more Crocos are sent. This formation repeats until the base is hit; then, a Berserkory and 6 Manic Island Cats appear! After Berserkory dies, the Manic Island Cat spawn rate increases even further. Brollow is also occasionally sent in ever increasing waves to smash your hope into little pieces after an hour of struggling to reach the base.

Strategies

Use a similar strategy to Fish Hell, but replace the Crit Cats with Dread Pirate Catley or another strong anti-Red Cat. More DPS is needed against the tougher Islands.
Using three spammable Cats makes Berserkory more likely to miss. Stack Crazed Dragon Cat, King Dragon Cat, Macho Legs Cat and Manic Macho Legs to kill the Berserkory quicker.

Strategy 1

This strategy is much different then fish hell. You want to bring 3-4 meatshields with Ururun Wolf and Pirate Cat's true form and start spamming and also bring Bahamut and keep on spamming. Do not bring awakened Bahamut because he has low range and will die easily. The rest of the army is up to you to make but if you bring an Uber make sure you bring rich cat. When Berserkory comes out he'll be knock backed alot if you have enough Pirate Cat's and Ururun Wolf, so it should be easy.

Strategy 2 (ft. hypermaxed Cyborg)

Demonstrated video: [1].

Line Up: 4 meatshields: Manic Mohawk, Manic Eraser, Mohawk Cat, Eraser Cat and Paris Cat (>40+35)
This is a spam-to-win line up. The Manic Islands behind Berserkory will clear out the player's peon. prevent Berserkory from creating shockwaves. The player should use their strongest Cats to fill up the other 5 slots.

Strategy 3 (ft. Bath Cat)

Demonstrated video: [2].

Line Up: 5 meatshields: Mohawk Cat (20+50), Eraser Cat (20+50), Manic Mohawk Cat (30), Manic Eraser Cat (30), Kirin Cat (30), Crazed Sexy Legs Cat (30), King Dragon Cat (20+50), Bath Cat (>30+3) Holy Valkyrie Cat (30), Ururun Cat (30).
One of the ideas here is to stack as many ranged-Cats as possible.

Strategy 4

Demonstrated video: [3].

Line Up: 4 meatshields: Crazed Cat, Crazed Wall, Eraser Cat, Mohawk Cat, Crazed Sexy Legs Cat, Dragon Cat, Dancer Cat, Holy Valkyrie Cat, Bahamut Cat and Ururun Cat.
Again, stack ranged-Cats is done here as well.

Strategy 5 (ft. Peach Devils)

Line Up: 4 Meatshields (Mohawk Cat, Eraser Cat, So-Ran Cat, Pumpkin Cat), Crazed Sexy Legs Cat, Crazed Whale, Peach Devils, Island Cat, Glorious Amaterasu, Diabolic Gao
Power ups: Rich Cat, CPU
Disable CPU at the start
Use Meatshields and Crazed Sexy Legs to stall and take out initial waves of Manic Island Cat. Push out Diabolic Gao (or any other ranged heavy damage dealer) and Crazed Whale and Island when funds allow
Make sure to have enough money for the anti-red ubers
When your cats reach base, deploy Peach Devils and Amaterasu (can probably substitute her with a strong anti-Red uber)
Hit CPU and wait for the win.

Strategy 6(ft. Kasa Jizo and Shishalan Pasalan)

Line Up: Bony Bone combo (Necromancer and Zombie cat), Biohazard combo (Mr. and Zombie), Sportswomen combo (Maiden and Butterfly), Jiangshi Cat, Kasa Jizo (must be hypermaxed), Shishalan Pasalan (close to hypermax), Awakened Bahamut Cat, Holy Valkyrie Cat/Yukimura.
Power-Ups: Rich Cat

First, wait for the first crocos to come near your base, then spam Jizo and Jiangshi.
When you have enough money, deploy Shishalan Pasalan.
Continue spamming jizo and jiangshi.
When the beserkory comes out, try to minimize the jiangshis to reduce the shockwaves taken.
Try to get Shishalan damaged a bit for damage increase.
When the boss's health is low, you can deploy your fast units. Assuming you're high on money, spam every cat for the win!

Note: Luckily, this strat doesn't require RNG! I got this to work on my first try. Good luck to everyone :)

Strategy 7 (ft. Gothic Mitama & Octopus Cat)

Line-Up: 4 Meatshields (Mohawk, Eraser, C. Macho, C. Wall), Octopus Cat, Dread Pirate Catley, C. Bahamut, 2 Heavy-Hitter Ubers (I used Mekako & Zeus)
Power-Ups: Rich Cat

First, spam Mohawk, C. Macho and Eraser to stall Manic Island and kill the Crocos. Keep stalling to save money
As soon as you get enough money for Gothic Mitama, deploy her. She will help stall the Manic Islands. She may be knocked back a couple times, but that's fine because she has 15 KBs.
When you get enough money, place Bahamut. This will help kill Manic Island. You'll get enough money from them.
Deploy your remaining ubers and spam everything. Even if your Octopus & Catleys die, they will always be on the battlefield, if you keep spamming them.
Keep pushing forward. Once you hit the base, you should have enough Catleys and a few Octopuses by the frontline. Any waves created by the Berserkory will be stopped by Octopus and Pirate Cat is kept safe and can knock back Berserkory. Any Manic Islands are kept behind Berserkory because of Mitama's huge AoE, and would be killed by your cats.
You would be able to start damaging the base because Berserkory would be pushed behind the base. Since he isn't a boss, he isn't locked between the base and your cats, which would kill your cats if Berserkory is free. Brollows wouldn't make a dent in your forces if you have done everything right and your cats are doing a lot damage.
Keep spamming everything and you will win. By now, your ubers and Bahamut would be done recharging. Spawn them to secure your victory. You got the true form for Crazed Fish!

Strategy 8 (ft. many ubers.)

Units: double mohawk double tank, manic macho legs, Jizo, Seafarer, Cat machine mk2, The peach angels and Lionheart.

Battle items: Cat cpu, Rich cat, Sniper the cat

Just build up money whilst keeping manic island away from your base and be careful not to attack their base too fast because you need full worker. Deploy your units and savnig some money, whilst keeping the berserkory and manic islands far from your base. When you have your ubers deployed turn on cpu and turn it off when money reach about 2500. Note: seafarer can be replaced by octopus to deny the shockwaves as there are no aliens thus making him an expensive meatshield. Manic macho legs is to get rid of the crocos and brollows. Keep sniper on at all times.

Strategy 9 (ft Octopus, Ganesha and Shishilan)

Lineup: Three meatshields, Manic Mohawk, Eraser and Crazed Wall, Cyborg Cat, Drama Cats, Octopus Cat, Manic Macho Legs, Ganesha, Ururun and Shishilan.

Rich Cat and Sniper for Power Ups.

Kill first few Crocos for money with Macho Legs (send just one). Then summon Ururun once you get enough money. Summon more area attack cats until the first few Manic Islands die. Summon Shishilan and Ganesha when the money comes. Do let them take a hit to trigger both of their strengthening buffs. When you are near the base (hopefully you can), summon octopus and don't stop. When Berserkory and the Manic Island wave arrives, just keep spamming the area attackers, octopus and the Ubers when they recharge. Shishilan is especially good here due to his great survivability and wave immunity. His big fists can nearly one shot most of the Manic Islands. Soon, as the big waves of Manic Island and Berserkory are dead, the rest is easy.

Strategy 10 (Eva Unit-00/Cat Machine Mk 3). By ShockwaverClass.

Cat Combos: Bony Bone or Biohazard

Power Ups: Rich Cat (Recommended but not necesary)

Lineup: (Cat Combo Units on the First Row) Goemon Cat (40), 3 Durable Meatshields (I used Eraser Cat (20+40), Manic Eraser Cat (31) and Ramen Cat (40+10 with full Talents), Paris/Cyborg Cat (40 or adove), (Wave Blocker (30)) and Ururun Cat (30).

Steps:

wait for some Crocos to get away from the first Manic Island Cat and send Goemon Cat to get extra money from the Crocos and after Goemon dies, start sending meatshields and spawn Ururun Cat. keep meatshielding and sending Cyborg Cats making sure you dont run out of money for the meatshields by sending her. Try to stack as many Cyborgs as you can until you reach to the Enemy base.
After the Boss spawns, send the cat cannon (if you can) and your Wave Blocker. Everything should be fine at this point. Keep sending meatshields and try not to run out of money because the Cyborgs. If Ururun Cat reloads, wait for the money to send her again and then just repeat the process until Berserkory and all of the Manic Islands are dead. Destroy the base and rule over the Ogres (?) to get your Crazed Whale Cat's True Form!.

Notes:

Paris/Cyborg Cat is the main scource of "Bankrupt" in the strategy, so try not to send her so often if you are running out of money.
Goemon Cat is only meant to be used at the beginning of the stage and not to be used as an actual attacker.

Strategy 10.5 (Eva Unit-02's Beast Mode + Eva Unit-00/Cat Machine Mk 3).

Cat Combos: Bony Bone and Biohazard or Macho Man and Silver Screen