Because of the influx of people not knowing exactly what type covers Physical or Special Attack, I've compiled a list as a reference to serve as a reminder and guide for building sets with Physical or Special sets.

Physical Attacking types:
-Bug
-Fighting
-Flying
-Ghost
-Ground
-Normal
-Steel
-Poison
-Rock

Special Attacking types:
-Dark
-Dragon
-Electric
-Fire
-Grass
-Ice
-Psychic
-Water

THE ONE EXCEPTION is Hidden Power, because no matter what type it takes, is still classified as a Normal-Type move, and will thus do physical damage. I hope this guide serves to be of help to those making or replying to Generation III RMTs.

BN:One Trick to remember this All the Eeveelutions types as for 4th gen, and Dragon type are Special. Also This list is didn't change from 2nd Generation games, so is applicable there too.