The Identical twin puppies are two of Spot's puppy amoebas that Plankton trains to distract people for one of his plans. They appear in the episode "Spot Returns."
The identical twin puppies are tiny translucent green amoebas who are about the same size as Plankton. They each have an antenna and three dark green spots, along with four legs on each side of their body, and a tail. They each wear a pink pullover with a purple zigzag pattern on the middle of it.