Ruling Altaria Pt?

[Zora]

Is this reseted if that pokemon switches out? I heard that ruling works with some pokémon, it confuses me.

Also, even if the Pokemon is awakened between turns, can another force (Such as Darkrai MD) still make Parish song work?

 

[King Arceus]

It is reset if the Pokemon switches out because all effects on a Pokemon go away when it goes to the bench. The second question I am pretty certain it is knocked out, but I will check with the other Professors and get their input.~Mark

 

[DNA]

It is reset if the Pokemon switches out because all effects on a Pokemon go away when it goes to the bench.

I have to disagree with you on that bit. Because of the way Perish Song is worded, the criteria is just that the Pokemon in question was attacked by Perish Song sometime during the last turn, and is now asleep on this turn. Then it can be knocked out.

I also checked the Compendium to confirm:

Q. If a Pokemon that was attacked by Night Eyes last turn goes to the bench, could I Gust it up, put it to sleep (with the Sleep! trainer or TR Drowzee), and then KO it with Perish Song?
A. Yes it would. (Nov 1, 2001 WotC Chat, Q9)

Q. Regarding the Perish Song Attack - Is there any way to clear the effect between the Night Eyes Attack and the Perish Song Attack next turn. Benching doesn't seem to as long as the conditions are met.
A. There is no effect to clear; it's a check of the Game State. Evolving, Devolving, or leaving play alters the Game State such that it is no longer the same Pokemon that got attacked by Night Eyes. But not benching. (Nov 1, 2001 WotC Chat, Q33; Apr 2, 2009 PUI Rules Team)