T.U.F.F. Meets Spongebob is the 21st episode in the 1st season of T.U.F.F. Puppy special crossover.
Plot: Dudley and Kitty are given a special assignment to stop Plankton, Snaptrap and every villain from their worlds. Bikini Bottomites and Mr. Krabs are kidnapped by Sheldon J. Plankton and Snaptrap. So they team up with SpongeBob, Patrick, Squidward, and Sandy to save both their worlds.
Patchy the Pirate, Potty the Parrot, Dudley Puppy, Kitty Katswell, The Chief, Keswick, Verminous Snaptrap, Spongebob Squarepants, Patrick Star, Squidward Tenacles, Mr. Krabs, Sheldon J. Plankton, Karen, Sandy Cheeks, Francisco, Larry, Ollie, The Chameleon, Bird Brain, Mermaid Man (cameo), Barnacle Boy (cameo), Man Ray, and The Dirty Bubble