I tried this one...
It did happen though.
But IMO, the acid weather only happens if the weather is "permanent"...
Which do happen if you sent out those ones with sandstream or snow warning.
But if the weather is "temporary" (Sunny day move, rain dance, etc.)...
I think it will only rain...
To try it, you may need the following:
1.) A pokemon with perish song (like Misdreavus)
2.) A pokemon with pursuit (like Scizor)
3.) Challenge any in-game opponent with 2 or more Pokemon.
4.) And a weather-inducer pokemon.
You know the drill...summon a permanent weather, perish song, then send a pokemon with pursuit. Then after the opponent's "perish song count" turns to 1, push the pursuit button.
If the opponent do switch, and faints, then Voila! The annoying glitch finally works!
Seriously, why didn't nintendo fixed this one?