These are the poor man's badge. They are worth 10 points and they are common.
“You may be looking for the Peashooter Zombie. The second most common achievement, this is worth...Peashooter zombie (badge)
“You may be looking for the Wall-Nut Zombie. This is a Wall-nut zombie that was frozen by the...Wall-nut zombie (badge)
“You may be looking for the Gatling Pea Zombie. This badge is gained for getting 10 edits on...Gatling Peashooter badge