Mecha-Dog

Mecha-Dog is a Basic Common zombie in the Hearty class. It has 1/2,  Armored 1, and costs 1.

Origins
Mr. Toxic is loosely based on the Build-a-Bot with the same name in PvZ:GW2.

With
This zombie is a quite basic zombie and has average stats for its cost. It does have Armored 1, however, and can be buffed by Screwdriver Wielder and grow enormous. It is also a good sacrafice for Disassembler, only costing 1 for a nice buff to all Machine zombies. You can use this as a cheap way to block a hit, or to buff Unlife of the Party.

Against
Stat-wise, this zombie is not threatening and can be removed with Whack-A-Zombie or other instant-kills. Its  Armored 1 could pose some problem, but it is not enough to be threatening. It might block you from a lethal, in which case you can use cards like Coffee Grounds or Time to Shine.

Trivia

 * It was made for The Enginator (PvZH).
 * It is the first Basic card for said hero.
 * It was also made for the new Machine class.
 * Said class will become a main  Hearty class.