At the start, a big group of buffed Those Guys appears. After a while, a J.K Bun Bun at 200% magnification will come out from the enemy base if any of Those Guys have been defeated. Ginger Snache will be supporting him a few seconds after J.K. spawns.
This stage has a very tight enemy limit. Right at the beginning, the limit will be filled with Those Guys, and J.K Bun Bun will be queued up along with support Shy Boys. This means that the first time one of Those Guys falls, the bosses will suddenly begin to be released. Even at 2400% strength magnification, they don't have much health, so consider entering the stage with a Rich Cat, or using the Cat Base to hold off Those Guys to save cash, you can also use attacks only units like warlock and pierre or long distance units like empress chronos to stall the those guys even more.
The biggest danger in this stage is not the Red Cyclone or J.K Bun Bun, but rather their boss shockwaves. As the two can spawn in quick succession of one another, you run the very real risk of all your heavy hitters landing behind the Cat Base and being unable to reach the front line in time. To get around this, don't release any important units until after J.K Bun Bun spawns, and save your Cat Cannon to stall for time immediately after Red Cyclone's boss shockwave. Another thing you can do to stop all your units from falling behind the base is to stall the J.K Bun Bun at the beginning of the stage.
(Note: There are still 5 slots left over; You can put anything you would like that you think will help for this level, or for the follow-up stage, Doom Paradise)
When the battle begins, upgrade your Worker Cat once. When Those Guys get close to your base, send in one tanky meatshield (e.g. Crazed Wall Cat), and a Sanzo Cat. Start spamming everything on Row 1 when Bun Bun arrives; You will have to depend on your Sanzo Cats to slow the enemies down, mainly the Red Cyclone, with the Cameramen dealing the damage. If you had brought any other units, use them if you need to.