>>29812215>>29812329I'm seeing it as a Pokemon that can be used to waylay dangerous opponents without taking much risk. It can come in on anything that's trying to be offensive and Twave it, U-Turn it to get something in safely because it will go after most OU pokes, Roar/Punishment something that had set up boosts, etc. Among those functions Porygon2 can only do the TWave.
It could also do something with Swords Dance, just using its fatness as a buffer to get the time to set up. It's got Double Edge, that's enough to do good damage despite its unamazing Attack. It can do some work against certain opponents but I think this usage is too easily stopped by defensive Steel types. Type Null is better off in a hybrid statuser/utility role with offense on the side IMO.