Come on, how can something with flower patterns that is shaped like a pillow or seapig, levitates, with anentirely different color scheme and eyes, evolve into a bipedal tapir, then evolve again into a paedo-mon with a pendulum?
I've explained this already. about three times. I don't know why you continue to deny it...
Munna is based off a Baku. right off the bat, that relates it to Drowzee, who is also based off a Baku. Munna has a trunk nose, like Drowzee, which relates their appearances. the colour scheme doesn't matter, since Pokemon change colours during evolution all the time (Mareep is blue, then turns pink, then turns yellow as it evolves). if you still think that's an issue, Drowzee and Hypno are both pink in their shiny forms, which matches Muuna. they both have forewarn as an ability choice, and are both pure Psychic type.
how is this not obvious? even now, the only thing that breaks this obviousness is Muuna's apparently big max base HP.