Yes it is, actually. All you have to do is look at what ability it has now; If it has the ability Hydration, it will have Poison Touch as a Seismitoad. This is because Hydration is the first ability of Palpitoad, and Poison Touch is the first ability of Seismitoad. If it has Swift Swim as an Ability, then it will have Swift Swim as its ability as a Seismitoad for the same reason; It's the second ability of both pokemon.