Henry II is a real-life goldfish in the ALVINNN!!! and The Chipmunks television series, featured in the episode Something's Fishy.
Background[]
Henry II was purchased from a pet store by Jeanette so that Alvin and Simon could replace Theodore's "goldfish", Henry, without him noticing after they assumed it to be dead (not knowing it was fake). The new Henry was placed into the fishbowl of the original Henry and Theodore pretends to act like he doesn't know the difference. That night, after an elaborate prank, Theodore tells Alvin and Simon that the original Henry was not actually dead, but only a plastic toy, and says that the had decided to name his new goldfish Henry II.