Fluxx is endlessly reskinnable. Looney Labs has made quite a few so far with no intent to stop. This time, they're headed under the ocean down to Bikini Bottoms for some of cartoon's most beloved characters. It's SpongeBob Squarepants.
From the website:
You probably already know who lives in a pineapple under the sea, but now you can join the whole Bikini Bottom gang in an undersea version of Fluxx! You can steal Mr. Krab’s Money or Squidward’s Clarinet, give a Krabby Patty to Plankton – you could even drive off in the Invisible Boatmobile! So, if nautical nonsense be something you wish, you don’t have to use your imaaaagination, just play Fluxx like a fish! Includes a collectible coin (and 7 bonus cards).