Filibuster Invasion (Cats of the Cosmos)

Filibuster Invasion (フィリバスター襲来ステージ, Filibuster Attack Stage in the Japanese version) is a special stage in Cats of the Cosmos Chapter 3. It temporarily overrides a random stage after completing the chapter for the first time and can only be cleared once, much like a Zombie Outbreak. Upon completion, Filibuster Cat X will be unlocked. This is a No Continues stage.
==Battleground==
*1 Filibuster Obstructa spawns as the boss after 1.67 seconds50f.
*1 Bun Bun Symbiote spawns as the boss after 80 seconds2,400f.
*1 Bore spawns as the boss after 10 seconds300f.
*1 Shadow Boxer K spawns as the boss after 6.67 seconds200f.
*1 Kid Tappa spawns after 3.33 seconds100f.
*When the base reaches 50% HP:
**1 General GreGory spawns as the boss.
*When the base reaches 25% HP:
**1 General GreGory spawns.
==Strategy==
Since Filibuster Obstructa will destroy the Cat Base in one hit regardless of where his attack fires off, you'll have to prevent him from ever completing his 40-second attack animation.
Filibuster spawns with a Kid Tappa, which can be ignored, as he doesn't do much damage to the Cat Base. Due to how Long Distance works, you should not try to spawn any cat units until Filibuster is close enough to the base, as while his standing range is truly massive, his minimum range is only 300. You can wait for him to almost complete his attack animation before spawning Courier Cat or other LD units to knock him back, then wait some more to ensure you have more than enough money. Once enough money is accumulated, summon Awakened Bahamut along with other cats that are effective against Aliens. Don't focus on Wave Attackers, as he is immune to Wave Attacks (which also means the Cat Cannon can't reset his attack animation), and don't bother with Cats with Warp Immunity, as none of the enemies here can warp. You can, however, use surge attackers (e.g. talented Dancer Cat), as while they are rare and tend to be inconsistent, Filibuster isn't immune to surges. Just beware that Filibuster usually won't move forward again once he's knocked back due to your units approaching him. 
After dispatching Kid Tappa, several enemies will spawn one by one (due to the enemy limit of 2) to assist Filibuster Obstructa, including Bun Bun Symbiote, Shadow Boxer K and a Bore. They largely function as meatshields for Filibuster Obstructa and players must build an effective multi-purpose lineup to deal with these threats before Filibuster finishes his attack animation. Megaphrodite and Oni Hayabusa are excellent Uber Rares for this stage, while Butterfly Cat and Castaway Cat would be the most effective Super Rares. Once all these enemies are down Filibuster is no longer a threat due to his absurdly high KB count, and can be easily finished off, as with the General GreGories spawned on base hit.
Sniper the Cat is very effective against Filibuster Obstructa, as it's able to continuously interrupt its attacks, granted it doesn't hit the enemy in front.
If you have Bombercat and iCat, it's a good idea to use both of them in this stage, because not only do they prevent Bore and Shadow Boxer K from easily defeating your units, but they make killing them a LOT easier, allowing your units to safely chip away Filibuster's health.
Pizza Cat and Elemental Duelist Cat also find themselves useful as they can make killing Bore and Shadow Boxer K faster.
===Strategy 1===
Kid Tappa spawns instantly, but just spam Can Can Cat during this part and you won't need to do anything else until Kid Tappa is dead. Using the money from Kid Tappa's death, spawn Awakened Bahamut to charge into Filibuster to knock him back. The Shadow Boxer K will then come out, just meatshield to protect Bahamut and he will be able to kill it easily. The Bore is what iCat is for. Even though the iCats you spawn will probably not be able to reach the frontline in time, this is fine because Can Can will usually be able slow the Bore until iCat gets there and then Bahamut just goes ham. Once you have 2 desynced iCats, upgrade your Worker Cat during this part and don't spawn anything else, as the Bore will die quickly due to Awakened Bahamut and since the Bore drops a lot of money upon death, upgrading your worker cat will allow you to get the most cash possible. Now for the hardest part of this battle; Bun Bun Symbiote. He is not really too big of a threat, as long as you have knocked Filibuster back all the way to his base beforehand, that is, because otherwise Awakened Mina will not be able to reach Filibuster and snipe him. Using the money that you got from the Bore, spawn Mina, Fishman, Octopus and Seafarer. eventually Bun Bun Symbiote will go down, leaving 2 General GreGories to defend him, both of which are easily killed.
=== Strategy 2 (ft. Courier Cat) ===
 
Yes, you can beat this with 4 level 30 units and 1 level 20 unit, all untalented. (Of course, higher levels and talents are recommended, combos are also recommended)
Lure Filibuster Obstructa to your base, where you will kill Kid Tappa with Courier Cat, Can Can Cat, and Fishman Cat, once you kill Kid Tappa, start meatshielding, at this point you should be able to knockback Filibuster Obstructa before the single Shadow Boxer K reaches your cats.
If you've done this correctly, you can just meatshield and spawn your damage dealers until you eventually perma-knockback Filibuster Obstructa until you win. (Although you might lose because of Bun Bun Symbiote blocking the path to knockback Filibuster Obstructa)
==Gallery==
Worldmap anim000 fili.png|Filibuster's Invasion spritesheet
==Trivia==
*Prior to version 8.3.2, Filibuster Obstructa's LD effective area was 50~4,300, causing him to stand in front of Kid Tappa. Since the latter does negligible damage, this allowed players to cheese this stage by enabling Sniper The Cat and deploying no units until Filibuster Obstructa was defeated.
*Filibuster Invasion has its exclusive theme that is only played in a select few stages, such as Hell's All-Stars and A Whole New World.
==Reference==
*https://battlecats-db.com/stage/s03008-in.html
Category:Main Chapters Levels
Category:Cats of the Cosmos Stages
Category:No Continue Stages