There are two main problem areas that I’ve found: getting energy and losing TMs. They both stem from a single problem, though, and that is letting your active Porygon take damage.

The deck can run on very little energy, and you could easily win a game with only 2 with the right draw and matchup. The problem is that your active Porygon-Z will, at some point, take damage. When that happens, you will want to retreat, Switch, Warp Point, etc. You would usually have another Porygon-Z waiting on the bench, and it’s easy to Install TMs onto the waiting Porygon. What is not easy, however, is getting energy onto the waiting Porygon.

The same issue applies to TMs. Sure, you can move them around, but what happens when your active gets KO’d?…