Using any anti-Red cats can make this level very easy. Use cats like Wall Cat to stall St. Pigge the 2nd to protect the anti-reds. At the start stack up Wall Cat, Macho Cat and Brave Cat while leveling up. Once you have about 6 cats save up for a Mythical Titan Cat. Repeat the process once more and then you should have 2 Mythical Titan Cats. Using Wall Cat, Brave Cat, Sexy Legs Cat and Dragon Cat (lv.20, 300% treasures, for 1-star difficulty) is also enough. Whale Cat can make incredible ease of St. Pigge, pair it with UFO and you should be done in no time.