Time to start covering the final variants that did not really belong in any other categories I see!
Peashooters and Sunflowers
Law Pea: The Law Pea deals 13-22 damage or 15-26 critical damage, which varies based on distance from you and enemy. The Law Pea will shoot as fast as you can press the trigger, meaning if you have a fast trigger finger, you can have a high amount of damage per second. However, he has no splash damage and only has 6 maximum ammo (instead of 10 by default). There is no way to improve his maximum ammo, and he will gain different upgrades instead. You may find the Damage or Reload upgrade to be useful for Law Pea!
Agent Pea: The Agent Pea deals 10-15 damage or 20-30 critical damage, which varies based on distance from you and enemy. The Agent Pea deals double critical damage, or double damage every time he lands a critical hit. He has 12 maximum ammo (instead of 10 by default). He has a higher attack speed and reloads faster, however he has no splash damage and only has 100 health (instead of the default 125). Ensure to aim for critical hits as you will deal double damage. You may find the Damage or Zoom upgrade to be useful for Agent Pea!
Stuffy Flower: The Stuffy flower deals exactly the same damage as the regular Sunflower, and every enemy that you vanquish will drop sundrops at their location, which will heal any ally that goes near your sundrops. This is great for healing your allies from far distances or giving yourself some quick healing during a fight. She only has 40 maximum ammo (instead of 50 by default). You may find the Damage or Health upgrade to be useful for Stuffy Flower!
Berry Shooter sounds fun but annoying to fight as well by the way!
Peashooters and Sunflowers - check!
