Porygon2

Porygon2 has an amazing defensive ability in Trace, allowing it to use the foe's ability against it. It has great 85 / 90 / 95 bulk that is further augmented by Eviolite. Using Eviolite is a double-edged sword, however, as it means that Porygon2 lacks the passive recovery of Leftovers. It also lacks strong bulk without its Eviolite, meaning that it is severely crippled by losing it via Knock Off. Regardless, Porygon2 has access to a decent STAB move in Tri Attack and decent coverage options such as Ice Beam and Thunderbolt. It also has a great support movepool, with access to Thunder Wave, Toxic, and Recover, a reliable recovery move that allows Porygon2 to stay healthy throughout the match. Porygon2's typing is decent defensively due to only having one weakness, albeit a common one, but it isn't amazing due to its lack of resistances, only being immune to Ghost. Porygon2 is also very susceptible to status ailments and is setup fodder for bulky sweepers such as Snorlax, Calm Mind Reuniclus, and Suicune.