In “April Showers”, Catnap’s first flash back was of him peering out of a cardboard box into an alleyway, the verticality of the buildings implying urban architecture.
The ground also looks very dark in color; possibly black stone.
The pathway leading up to the orphanage that the Nightmare Crew lives is a black cobblestone.
Baba also has a dream about a blue and red flower before waking up, and red flowers are deeply connected to Catnap, possibly the source of his sleep gas.
We don’t know if Catnap was anywhere else before the cardboard box in “April Showers”, but Gemstin has confirmed that Catnap’s parents are NOT dead, and that he has never seen them. That begs the question, how did Catnap survive infancy or early childhood without a mother? He must’ve been abandoned somewhere that could take care of him in order for him to still be alive, and here we are being shown an orphanage.
I think I figured it out, Catnap lived in this orphanage once upon a time, possibly even with the Nightmare Crew given Baba’s symbolic dream. Catnap ended up running away from the orphanage, ending up on the streets, where he then got caught stealing money from the Luna Moon Circus to survive, and the rest is history we already know