Panty & Stocking with Garterbelt

Synopsis

Panty and Stocking's sibling feud escalates into all-out war when they eat the cores of two warring alien robots and transform into robots themselves. When the alien robots decide to join forces to destroy the human race and merge into a Ghost, Panty and Stocking are once again forced to work together to defeat the Ghost.

Garterbelt gets angry at Panty and Stocking for wasting money, so the sisters make a bet to raise $3 million in three days. Getting jobs proves difficult for them, so they resort to going to a casino run by Scanty and Kneesocks, who rig their games to ensure the angels will lose. The Anarchy sisters eventually run out of money, but by selling their clothes to onlookers, they manage to play long enough to break through the Demon sisters' scheme and earn their $3 million.

(Source: Wikipedia)