Watch it be Cynthia's evil twin sister, Synthia!
While her goody goody twin sister was kicking ass and investigating ruins in Sinnoh, Synthia was shipped off to reform school at an early age after she was found pouring toxic chemicals in a pond near Solaceon town; chemicals that she KNEW could increase the severity of the local Psyduck population's migraines as a side effect! Fed up with being held down by the righteous man, Synthia broke out of her reform school and formed the evil Team Plasma after a fateful one-night stand resulted in the birth of her first child, a baby boy whom she notoriously named 'N', for reasons the world will never know. It makes PERFECT SENSE!
Or, you know, it could just be Cynthia on vacation or something. But I think my completely crackpot theory is waaaaayyyyy more plausible than that, right guys? .....Guys?