Pistachions are a race of evil mutated creatures, born from pistachios which were led by King Pistachion in the episode. They are initially villains from Milo Murphy's Law, but they were featured as the antagonists of their crossover with Phineas and Ferb, "The Phineas and Ferb Effect". They are solely interested on taking over the world and replacing Phineas and Ferb's friends into pistachions in order to do so. They also used masks to try to fool people, but this often didn't work. They also made an invention to turn the world toward them.
