It is based on the object in real life with the same name.
Statistics
Class: Sneaky
Tribe: Trick
Abilities: Move a Zombie. It gets +1.
Set - Rarity: Basic - Common
Card description
Good for eluding the enemy. Bad for the lungs.
Strategies
With
Smoke Bomb can be used to move powerful zombies, especially Anti-Hero zombies, into empty or poorly defended lanes. Additionally, the fact that the moved zombie gets +1 makes this trick even more useful. This allows the zombie to either do a good amount of damage on whatever is on there, save itself from any attacks on its previous lane, or both.
If you play as Template:PvZHLink, consider trading this out for Super Brainz's signature superpower, Carried Away. Both do relatively the same thing by moving a zombie, but Carried Away lets it do a bonus attack, which is more useful than +1 in many cases. However, Carried Away is more limited in terms of obtaining it, so Smoke Bomb should be your main source of moving zombies, if needed.
Against
Smoke Bomb can save a zombie you thought you would surely destroy, and allow it to hit harder. Space Cowboy, as well as other zombies with either high strength or the Anti-Hero trait will most likely be the primary targets, so it is worth prioritizing on taking them down first.
As for its counters, there is not much aside from swarming the field with as many plants as you can. You can also track the zombie down with Corn Dog, although Corn Dog will surely be destroyed. Or, since it is a trick, Forget-Me-Nuts, Brainana, or Dark Matter Dragonfruit can increase its cost or downright prevent it from being played, but Forget-Me-Nuts are only effective in either the early game or in large quantities.