Petey was not always evilLil Petey is a clone of Petey, the self-proclaimed Worlds Evilest Cat, but he is not evil. At first, this appears strange, but... Lil Petey is a clone of a YOUNG Petey, which would imply that Petey was born good, but experienced some trauma during childhood that caused him to be evil, and if that never happens to Lil Petey, then he will remain good.
- Lord of the Fleas confirmed this. Petey in his youth was the splitting image of Lil' Petey, and was once a member of the Critter Scouts, being known for his good deeds. He got kicked out when Crunky, Bub, and Piggy (who were also members) blamed him for acting out unsupervised, putting him on the path to evil.
- On top of that, it turns out that his father was a terrible person who treated him terribly, behavior he continues when he reenters Petey's life.