Bark Shield Zombie

Bark Shield Zombug is almost the same as a Screen Door Zombie, with a few notable exceptions: no physical or electric attack can pass it(including fumes), fire attacks deal double damage to the shield, and that's it!

Overview
[Check this] and add what I put above and done!

Strategy
Laser Bean. If you cannot get/use one, use pea-shooting plants and Torchwood.