>>51221582Dark Pulse + Ancient Power
For held items, you'll want to be picking Muscle Band and Scope lens. For the third item slot, it can be focus band or weakness policy. I prefer Focus Band myself for extra bulk when being a Larvitar/Pupitar. I didn't test it yet, but maybe Razor Claw is a good choice too.
For emblems, go full Crit Rate.
Dark Pulse + Autoattacks is your main source of damage, while Ancient Power is your chasing option + defensive move that you use to get shields.
The thing with Tyranitar is insane crits dealing 2k-3k true damage that absolutely delete everything in his path. For battle items I recommend Full Heal or X-Speed. X-Speed helps a lot to escape early as Larvitar/Pupitar, while Full Heal helps against Tyranitar's main counter - CC. Delphox fucks him up easily.
