It negates all abilities, bar none.Does Gastro Acid negate both a Pokemon's natural ability and abilities gained through, say, Magnet Rise?
No.If a Pokemon uses Psychic three times in a row to lift an object and wants to continuously keep it lifted, does it loosen its hold at the end of every action?
Yes.Can Staryu use the egg moves that it was programmed to get in generation II?
No.If the enemy was charging at you, would you be able to combine a priority move and Grass Knot to dodge and then trip them?
I'll fix the aerial ace thing later, not sure what you mean about the EXP thing and perish song.
Probably missed some, don't have time to go back and look now.