In the disscusion topic, many people seemed to prefer Download over Adaptability, but on GameFAQ's and other sites, Adaptability gets all the love. Here are the Pros and Cons of each:
Adaptability:
Pros
-Boosts normal type moves to super high power levels
-Reliable ability, nothing varies
Cons
-Tri-Attack is the only normal move Porygon-Z really uses
-Doesn't boost Porygon-Z's other attacks
-It's usless against normal immune pokemon
Download:
Pros
-Can give you a 50% increase in Sp. Attack just for coming in against certain pokemon
-Helps all of Porygon-Z's attacking moves, not just Tri-Attack
-Gives an option to use a different attack over Nasty Plot
Cons
-It's unreliable, if your Sp. Attack isn't boosted, it's pretty usless
-Can be taken away by stat-lowering attacks
I personally like Download, although I also think that the payoff is worth the risk, while others don't Which will reign as the best ability for Porygon-Z?
Adaptability:
Pros
-Boosts normal type moves to super high power levels
-Reliable ability, nothing varies
Cons
-Tri-Attack is the only normal move Porygon-Z really uses
-Doesn't boost Porygon-Z's other attacks
-It's usless against normal immune pokemon
Download:
Pros
-Can give you a 50% increase in Sp. Attack just for coming in against certain pokemon
-Helps all of Porygon-Z's attacking moves, not just Tri-Attack
-Gives an option to use a different attack over Nasty Plot
Cons
-It's unreliable, if your Sp. Attack isn't boosted, it's pretty usless
-Can be taken away by stat-lowering attacks
I personally like Download, although I also think that the payoff is worth the risk, while others don't Which will reign as the best ability for Porygon-Z?