User blog comment:Repeater1947/Epic PvZ Quiz/@comment-4775209-20130810190826

1. Beat everything.

2. No.

3. Heat Wave.

4. 6.

5. Marigold (and only in the Zen Garden).

6. Cactus (when attacking a Balloon Zombie), Cob Cannon (when firing a cob), and Tall-nut.

7. No (but if you upgrade 2 Kernel-Pults when a Bungee Zombie is stealing one of them, he won't steal anything when he gets reeled back up).

8. Itself and all Upgrade Plants

9. Gatling Pea, Twin Sunflower, Gloom-Shroom, Cattail, Spikerock, Gold Magnet, Cob Cannon, and Winter Melon.

10. Wall-nut, Tall-nut, Pumpkin, Garlic (pure defense), Hypno-Shroom, and Umbrella Leaf (somewhat) (not counting Imitater versions).