Simple answer: Ice Punch
More detailed answer: Why tlf are you using offensive Tyranitar in Gen 8 AG?!? Don't. Please don't!!!
I started by asking the question to Lider Meliodas, an experienced AG player. They responded with this:
ice punch for zyg
You got your answer on that, but this question makes me rage so I can't leave it here.
I also asked Lider Meliodas if offensive Tyranitar is good in Gen 8 AG. Almost all of us know the answer but here is what they said:
Not much, with monsters like zac-c and hero. ttar is much better as caly check.
Of course, Yveltal can also Caly-Shadow handle this but Tyranitar also can counter Yveltal so yeah :/
Why would you use offensive Tyranitar anyways? Zacian-C exists, Groudon exist, Necrozma Duskmane exists, ThE wHolE mEta ExIsTs. Just no. It's horrible. Here is the smogon set for AG (which I also use):
Tyranitar @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Stealth Rock
- Rock Blast
- Foul Play
- Rest
So yeah, Ice Punch for Zygarde, other than that, use Tyranitar as a Specially Defensive counter to things like Caly-Shadow and Yveltal. Also check the viability rankings like Frozen Inferno said. You will find much better offensive Pokemon to use. Also, if you want to use Physical Tyranitar, play OU I don't play OU so I looked at an OU set because someone deceived me ;-;
Tyranitar @ Choice Band
Ability: Sand Stream
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Stone Edge
- Crunch
- Fire Punch
- Ice Punch
So yeah. OU is the place to use Physical Tyranitar. I also recommend checking out this for more info. Hope this helps.