Porygon2 is basically the king of setting up Trick Room in Nu. Slow, Bulky, High Sp.Attack, BoltBeam, and Tri-Attack?
Good pokemon I've found for Nu Trick Room:
Setting Up:
Solrock as a Lead
Gardevoir
Porygon2
Eggy
Abuseing:
Marowak
Medicham
Gardevoir
Porygon2
Eggy
Kingler
Ursaring [Guts]
Rampardos
Basically anything else with High Attack/Sp.Attack and Low Speed.
Porygon2 should basically be on every Trick Room team, as it can set it up, reliably recover, and abuse it, all with a single moveset. Gardevoir is a good backup, especially to deal with the Fighting-types.