The battle will start with a few Pigeon de Sables. After that, nothing else will spawn until the base is hit, where Brollows and more Pigeon de Sables will be spammed, along with a Mr. Mole and Tackey.
If you take a little longer, another Mr. Mole will spawn, with more Tackeys.
Lineup: Crazed Macho Cat, Eraser Cat, Crazed Wall Cat, Crazed Sexy Legs Cat & Macho Legs Cat (to activate the Legs For Days Cat Combo), King Dragon Cat, Jamiera Cat, Crazed Mythical Titan Cat, Holy Valkyrie Cat, Awakened Bahamut Cat
Begin the battle by spawning a Jamiera Cat. He should be able to hold off the Pigeon de Sables. When the base is hit, the Knockback King, the Push-Back Prince himself: Mr. Mole appears, WITH Brollows, Pigeon de Sables, AND Tackeys being spammed. As quickly as you can spam meatshields, Macho Legs, Crazed Sexy Legs, and the tanks (King Dragon, Jamiera, etc.). After some time, spawn Holy Valkyrie. After she dies, send out Awakened Bahamut once Mr. Mole has finished his attack animation. Bahamut will most likely die quickly, because of Mr. Mole. The enemies should get very close to the Cat Base, so expect your base to take a couple of hits. After some time, Mr. Mole will get knocked back. Just continue spamming your units until Holy Valkyrie is available again. Try to hold out some more, and the Brollows and Pigeon de Sables will stop spawning. Because Tackey and Mr. Mole are both long ranged, and there are no close range units, the level should stop being too hard. Even if one cat enter the enemies' "blind spot", they will slowly die.
Now all that's left is to destroy the Enemy Base! Onward to Victory!