Cuckoo Zombie is best used as a glass cannon, so that it can do a lot of damage to the plant hero or to take down a powerful plant. A trick like Vitamin Z should be used to have its health increased in order to live through some damage.
Due to its unique tribe, it is not able to be boosted by zombies like Zookeeper or Team Mascot, so the player should resort to Loudmouth in order to boost its strength and health points.
This card may have a high strength, but its 1 makes a huge difference. Every card that has 1 can deal with him easily.