Dr. Zomboss had his zombies turn your lawn into a baseball field. Catapult baseball zombie will lob basketballs for you to hit during this baseball game(does anyone else find this confusing). Try and get a home run. Defeat the Baseball zombies, super fan imps, and baseball stars(catcher) by hitting them with a bat or hitting them with the basketball. Zombies will increase in speed as you get more home runs. Don't let the zombies eat your brainz. Get 100 home runs to win! You can only get a homerun if the ball is hit over the plate.
Based off the Homerun derby on the Nintendo DS version of Plants vs. Zombies. Without super fan imps or baseball stars. And with plants.