The type depends on the environment you are in, and every-time you start a battle on PO the environment is different. For example, if you enter a battle with a desert environment it would have the same effect of when its used in the desert in the video games. If its a water environment i would have the same effect it would have in the game when its used in a water environment. This here lets you know what effect goes to what environment. How i know that the environment changes every battle? I went to VP this morning and had like 25 battles just to test. So heres your answer hope i helped.
