I was watching Rattleballs for reasons when something clicked. At least, I think it did. The facility for producing as well as destroying the Rattleballs robots was the same facility that the Royal Tarts are produced in.
Who’d have thought such delicious pastry would come from the same place as Bubblegum’s killing grounds?
P.S. Hell this might be the huge factory where the Gumball Guardians were first built in The Vault