Incubus - when the pill is applied, all the incubi present get the effect. But most importantly, the effect is saved and summed up between levels.
Dr. Fetus - works like PVZ2 coconut cannon, but with the catapult pattern; provides weak protection, equal to two ordinary babies
Epic Fetus is placed in the active item slot if there is a Dr. fetus in the deck and Doctor's Remote was selected as the active item. Works as PVZ1 Cob Cannon.