Where do i find the pink switch palace in super mario world?

Answer 1

There is no pink switch palace.

There's only Yellow(on the first island you start on)
Green(On the donut island)
Red(In the cave)
and Blue(In the forest)

Answer 2

this game is sooooo old!! but from what i remember : anytime w/ Mario Bros. you simply jump up and down in the air especially where there is lots of "sky" secret switches abound!! and there IS a pink switch palace...