Acturally it's Polo island, its near universal and polo is larger so not to confuse the two.

And yea like Crunch said. For junior you can get any time but you need 3 chameleon tongue, 2 ant antennas, and 5 dragon tooth.

For Senior: You need to lvl Junior, MUST be 10 or higher, 5 stars, 2 magic powder, 5 clear devil spar (you can get from manufacturing 10 devil spar piece to make 1 spar and or fighting random wind high lvl monsters in selected places I'd suggest sitting at the wind panda in china there is a spot a the bottom near the bridge when 2 passes so instant spawn means faster collection and they only come in 1s. Also the snow white quest on iceberg gives you 2 you need the crystal from the water falls in south island near holy village.) and finally 2 blue stone (which you can mine from mayan cave where you get white silvery you need shasha with 70+ amity to enter the cave or from oslya the clay/tar pit.)