Toxic Citron

Toxic Citron is an upcoming toxic variant of Citron in Plants vs. Zombies: Garden Warfare 2. He will be released in the Trouble In Zombopolis: Part One DLC.

EMPeach
EMPeach, like its  Plants vs. Zombies 2  counterpart, slows down and lightly damages zombies in its radius. It also prevents zombies from using their abilities.

Citron Ball
When Citron Ball is used, Citron curls up in a ball, increasing its jump height and speed. It is most likely used to chase after Imps, as their increased speed and agility make it harder to hit them. When in Citron Ball form, Citron loses the ability to shoot and use EMPeach and Peel Shield, but gain Hyper Ball and Ball Charge as new abilities which replace the former two.

Peel Shield
If Peel Shield is activated, Citron gains a shield in front of where it is facing, absorbing a certain amount of damage. However, Citron is still vulnerable to shots to its side and back.

Hyper Ball
Hyper Ball is the first ability available for Citron in Citron Ball form. When used, it further enhances Citron's already enhanced speed and jump height.

Assault Mode
Citron goes back into his normal form, allowing Citron to shoot again, and replacing Hyper Ball and Spin Dash with EMPeach and Peel Shield.

Spin Dash
Citron will slow down and roll in place for a few seconds, before charging forwards and hitting any zombies in its path, dealing damage to them.