Choco-Head Zombie
Choco-Head Zombie's chocolate zombie-head sculpture provides both toughness and tastiness.
Health: 2200 (chocolate) + 190
Speed: 0.185 tiles per second
Dr. Zomboss finally managed to find a way to increase the durability of chocolate to the point where it could double as an effective piece of armor. It didn't matter, though—those leftover chocolates from the Valenbrainz season have gone stale enough to make a good enough helmet already.
Springening Rally Zombie
Springening Rally Zombie leads an army of zombies ready to... spring... into action.
Health: 350
Speed: 0.4 tiles per second
He found the flag inside a plastic egg back in 2009. Over the years he's found some other crazy stuff in those egg hunts, too, such as a microwave, a bed, an entire shopping mall, a Dyson sphere, the legal rights to the entire ZCorp megacorporation (which he actually turned down), a gateway to an alternate universe, and an ugly sweater. People say he's cheating, but in reality he just has a good gaming chair (which he also won from a plastic egg).
Egg Cannon
Shoots not imps, but eggs that hatch into imps. Eventually it can explode and rain down imps.
Health: 600
Speed: 0 tiles per second
Damage: fires Chick Imps to mid-lawn
Special: explodes into shower of Chick Imps if not destroyed quickly
Zomboss originally contemplated putting imps in green leprechaun costumes and firing them out of a cannon resembling a pot of gold. While that worked perfectly fine, he decided to scrap that and switch over to this instead. It didn't really matter to the imps: they don't actually celebrate any holidays, they simply enjoy dress-up.
Egg Hunter Zombie
Swings in past defenses, ready to collect plastic eggs, or brains, whichever comes first.
Health: 760
Speed: 0.155 tiles per second
Not to be confused with the "Egg Hunter Zombie", the retired zombie who throws plastic eggs with snowballs inside them in order to freeze plants. On a related note, first it was microwaves and ugly sweaters, now it's snowballs. Who keeps filling eggs with those things?!
Turquoise Egg Zombie
Uses egg to steal sun, then unleashes energy in a destructive beam.
Health: 250
Speed: 0.185
Being allergic to pollen since birth has ruined springtime for him, his whole life. And even though his allergies don't affect him now that he's undead, his hatred for the season is still flowing through him, the result of years of flower-related traumas. Now he wants nothing more than to (and this is actually what he wrote down) "overthrow this blasted pit of suffering that's been flourishing for eons longer than it deserves, burn every last shred of green to the ground starting from that pan-wearing, plant-worshipping maniac's garden, and build a new, brighter civilization from the ground up using entirely concrete."