Electric/Ghost (Porygon-Z) @ Leftovers
Ability: Adaptability
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
- Nasty Plot
- Shadow Ball
- Thunderbolt/Discharge
- Substitute

Since the metagame is currently leaning towards bulky walls, Porygon-Z has a very easy time switching in and setting up against offense and stall teams alike. Chansey and Clefable are literally the only Pokemon that can take all variants reasonably well, but they still struggle against Porygon-Z when it sets a Substitute. Porygon-Z seems to be broken at the moment, and is currently overcentralising the metagame, so I think it should be banned. Let me know your opinions.