So where do all the JJ2 tilesets come from? The following seem pretty unambiguous:
Carrotus: Lion King, Hakuna Matata
Labrat: Earthworm Jim, New Junk City
Damn: Lion King, Pride Rock

Inferno appears to come from Earthworm Jim, What The Heck, at least the floor and background, but the soil is quite different so there may be some better or second source I'm not remembering. I assume Diamondus, Tubelectric, and Medivo are "originals." This leaves Castle, Jungle, and all of Jazz in Time. Does anyone recognize these from anywhere else?
(I don't remember any claims that JJ1 planets come from anywhere else, minus the groundless accusation that every JJ1 set is "traced" from Sonic. You could maybe say that Sluggion resembles Emerald Hill, but after that you're on shaky ground at best.)