Sweet XP (Hard) is the third stage in Weekend Stage/XP Stage.
Paris Cat at Level 20+ can easily knockback the Shadow Boxer K before she can attack.
To easily beat this stage, send out 3 Paris Cats to kill the Gories, then begin saving for Bahamut Cat. After the Paris Cats reach 1/2 way across the battlefield, send out Bahamut Cat. When they begin attacking the enemy base, start spamming Wall Cats and Macho Cats. Continue spamming meatshields and the occasional Paris to win.