The September event lineup in Pokemon GO is absolutely stacked. There are a number of Pokemon debuts awaiting players. One of the most anticipated ones on the long list is Celesteela's arrival in the Northern Hemisphere. Usually region-locked, this Ultra Beast will be available north of the Equator for the first time in the game.Celesteela will be appearing in five-star raids in the Southern Hemisphere from September 1-8, 2023, and in the other half of the world from September 8-16, 2023. For those interested, the pattern is reversed in the case of Kartana.Once you catch Celesteela in Pokemon GO, you might be wondering what its ideal moveset for GO Battle League is. Here is a quick overview.Which moves can Celesteela learn in Pokemon GO?Celesteela (Image via Niantic)Celesteela can learn the following Fast Attacks in Niantic's mobile game:Air SlashSmack DownThe Charged Attacks Celesteela has access to are:Iron HeadBulldozeBody SlamHeavy SlamBefore going into its movesets for various situations, it is important to analyze the creature's elemental typing. Celesteela is a Steel- and Flying-type. Therefore it gets same-type-attack-bonus (STAB) from these two types.When it comes to stats, Celesteela is very well-balanced, with 207 Attack, 199 Defense, and 219 Stamina.Best PvP moveset for Celesteela in Pokemon GOThe best PvP moveset for Celesteela consists of the following Fast and Charged Attacks:Fast Attack: Air SlashCharged Attack: Body Slam and Heavy Slam/BulldozeAir Slash is the only Flying-type attack that Celesteela has access to. Therefore, it is the only way for the critter to apply STAB-boosted Flying-type offensive pressure. Moreover, Air Slash deals 3.6 damage (with STAB) per turn and generates 3 energy, which is good enough.Celesteela's first choice of Charged Attack is Body Slam. This is a Normal-type attack that does 60 damage and consumes 35 energy. Celesteela reaches one Body Slam every four turns, making it the perfect Shield Bait.You may go for either Heavy Slam or Bulldoze for Celesteela's second Charged Attack. While the former gets STAB, the latter provides coverage against the only two elemental types that threaten super-effective damage on Celesteela.Heavy Slam does 84 damage and consumes 50 energy, taking Celesteela 6 turns to reach. This move's damage-to-energy ratio comes to 1.68. Bulldoze, on the other hand, does 80 damage and eats up 60 energy, making its damage-to-energy ratio 1.33.For Pokemon GO Battle League's Ultra League, where Celesteela performs best, Heavy Slam outdoes Bulldoze against meta-picks in both zero- and one-shield situations.Best PvE moveset for Celesteela in Pokemon GOCelesteela is a five-star raid boss (Image via Sportskeeda)The best PvE moveset for Celesteela consists of the following Fast and Charged Attacks:Fast Attack: Air SlashCharged Attack: Heavy SlamIn Gym and Raid Battles, Celesteela should only use STAB attacks to maximize its damage potential. Air Slash and Heavy Slam form the perfect pair for this purpose.Best counters to Celesteela in Pokemon GOThe best counters to Celesteela in the Ultra League are:Regsteel with Lock On, Zap Cannon, and Focus BlastAlolan Sandslash with Shadow Claw, Ice Punch, and Drill RunAurorus with Powder Snow, Weather Ball (Ice), and Meteor BeamCharizard with Wing Attack, Dragon Claw, and Blast BurnEmpleon with Waterfall, Hydro Cannon, and Drill PeckIn the Master League of Pokemon GO Battle League, the best counters to Celesteela are:Giratina (Origin) with Shadow Claw, Shadow Ball, and Ominous WindMelmetal with Thunder Shock, Double Iron Bash, and SuperpowerDialga with Dragon Breath, Iron Head, and Thunder/Draco MeteorZekrom with Dragon Breath, Crunch, and Wild ChargeHo-Oh with Incinerate, Earthquake, and Brave BirdThe Paldean Starters are also making their debut Pokemon GO appearance in September. You can check out the best moveset for Meowscarada here.