A crafty gamer named Foggles took it upon himself to remake "Plants vs. Zombies" (called "Plants vs. Zombots," presumably for copyright purposes) in "Little Big Planet 2". It's a slightly primitive game compared to the real thing but it has everything from sunflower collection and generation to the placement of pod shooters.
Owners of LBP2 can download the map for free directly from the game's online service. Be sure to check watch the video of the game in action.