[SUGGESTION] Special Zombies

 Currently, the zombie balancing is rather strange, to say the least; they have a lot of health and some abilities that aren't threatening enough. Don't get me wrong, health is a stat and it complements the zombie's ability, and this is even more necessary in a game where fusions cause a lot of damage, but due to the lack of work on the ability, it ends up just becoming a generic tank zombie.

 My suggestion is quite simple: reduce the health of certain zombies and improve their mechanics, either by improving other stats or the trick itself.

I'll give some examples

Chicken Wrangler

 Increase speed, decrease health, and have the chickens spawn in 3 different directions.

 Reason: It's a nerfed Pigeon Feeder Zombie, with these changes, it will be different. Its only function is to spawn chickens, it needs speed for that, and dying faster is also a good thing. It doesn't need a significant decrease in health, but the current amount is ridiculous for a zombie of this style.

Batter Zombie and Volleyball Zombie

 Add another ability besides the one they already have, decrease the Volleyball Zombie's health, and increase the damage caused by its current ability. Also, add an opposing zombie with them more frequently, such as the Goalie Zombie or the Screen Door Zombie.

 Reason: They have a lot of health, and their abilities are only activated if you use a counter. Furthermore, the Volleyball Zombie's ability is harmless even when activated, so what remains is its EXTREMELY high health, making it just a zombie with a lot of health. The Goalie Zombie, for example, changes lanes, so even if it doesn't use its main ability, it will still do something.

Suggested abilities:

 Volleyball Zombie; Attack without needing to be attacked by a catapult projectile, but with a longer cooldown; This attack can pass through nuts and target back defenses (Umbrella Leaf could protect and Juggernut could prevent the ball from passing). If attacked by a catapult projectile, deal more damage and remain immune, or just remove that mechanic. I personally prefer it to be a ranged zombie, with less health than the Bowling Zombie but attacking much faster.

 Batter Zombie: Instead of eating plants, hit with the bat, dealing more damage, making it a different kind of threat, plus it would create something interesting: you could use catapult plants to prevent it from getting close and use the Umbrella Leaf to negate its attack. Also, split its health, half armor and half health, since it has a helmet, this would be a buff for piercing plants.

Screen Door Zombie and Parasol Zombie
Reduce Door/Parasol Armor

 Reason: It's too much, I just don't think it needs to be that much. If it's 2500 armor for both, that's already good enough. They are Zombies that are resistant to certain types of attacks, making them have so much armor basically makes them immune.

 Commenting further on the Zombie mechanic that negates damage, I don't see a problem. The worst issue is when it does nothing if you don't bring a counter, because we already have zombies like that, the Parasol Zombie and the Screen Door Zombie. Although it doesn't negate damage, you'll want to use what hits its life instead of its defense.

Anyway, thank you for reading this far.