Snow Pea

shoots frozen peas,slowing down zombies.

Plants Vs. Zombies: The Next Levels
Snow pea is unlocked much, much later into the game. Not appearing until world 7.

Almanac: Snow Pea loves snowball fights. She is quite known for an unfair strategy of eating the snow and firing snowballs at rocket speed, so nobody wants to play with her anymore.

Trivia

 * Snow Pea is referred to as a girl, despite being referred to as a boy in every other PvZ game.
 * Snow Pea is unlocked in the Snow level.

PvZ The Fall of The World
Plant food effect: Shoots 125 snow peas and shoots a piercing snow pea.

Almanac: The coolest in Pea City, he enrolled himself in Apocalyspe Battler Corps. Yeah, he's the coolest. Literally.