Galarian Zapdos

Of the three Galarian versions of the legendary birds, Galarian Zapdos is by far the saddest case. Despite having a few genuinely good traits and capabilities such as a good (not great) Attack stat and access to Counter and Fly, it really can't find a niche to call its own. Galarian Moltres has a low Attack stat, but it at least has access to Wing Attack and Fly together. Galarian Articuno lacks a Flying Type Fast Move, but Psychic compliments Flying well enough that it has its niches. Meanwhile, poor Zapdos is stuck with Flying and Fighting, which are two types that have very little synergy. In fact, outside of niche type combinations like Grass and Normal. But even then, the big problem is that Zapdos is trying to compete in not one, but TWO of the most competitive and over-powered types in the game. Sadly, it REALLY cannot make a niche for itself outside of "decent Fighting Type attacker".

Best PvE Offensive Moveset

• Counter is the best Fast Move for Fighting-type attackers, and Galarian Zapdos makes good use of it.
• Close Combat pairs well to fulfill a Fighting-type role.
• Fly is amazing, but it's hard to make it really work on Galarian Zapdos.
• Brave Bird lacks synergy unfortunately. 
• Ancient Power is a poor move. 

Galarian Zapdos has a very limited moveset with almost no flexibility in its moveset choices. Fortunately, Counter is a strong Fast Attack, offering a strong combination of damage output and decent energy generation.

Fly is Galarian Zapdos's most reliable attack. Close Combat threatens massive damage, but applies a harsh self-debuff on the user, making it a high risk, high reward move.. Brave Bird has the same profile, but costs slightly more energy and offers additional Flying-type burst instead. Ancient Power is unfortunately a poor choice due to its pitiful damage output. It ties with Close Combat in terms of energy cost, making it unimpressive to use for baiting shields.