I would be thrilled to report that I loved “Plankton: The Movie,” a “SpongeBob SquarePants” spinoff film. I'd love to say that it is the cinematic hit of the spring. Alas, I cannot.

Sheldon J. Plankton, the owner of the Chum Bucket, has been a staple of SpongeBob SquarePants since the first season. His ...

Plankton must team up with his unlikely frenemy, SpongeBob, to save the world, all while trying to salvage his marriage. The film is a blend of adventure, comedy, and musical elements, with plenty ...