Shadow Regigigas is all set to make its Pokemon GO debut during the Halloween 2023 Team GO Rocket Takeover event. It will replace Regirock as Giovanni's ace when you encounter him in battle between 10 am local time on October 26 and 10 am local time on December 1, 2023.Once you defeat the nefarious boss, you will get a chance to catch the Legendary Pocket Monster.You might be wondering how you can find Giovanni and what team you should fight him with for the best chance at victory. Don't worry, as this article will break down everything you need to know on the matter.How to find Giovanni and Shadow Regigigas during Team GO Rocket Halloween Takeover in Pokemon GO?Giovanni and Shadow Regigigas can be found in Pokemon GO by taking part in a Special Research called Showdown in the Shadows. It is a five-stage research story, of which the third stage gives you a Super Rocket Radar as a reward.The first two stages involve catching and transferring Pocket Monsters, spinning PokeStops, and defeating GO Rocket Grunts. You receive XP and Stardust for completing each level.The third stage is where things get slightly more difficult as you have to defeat Arlo, Cliff, and Sierra once each to earn the Super Rocket Radar.On activating this special item, you can find Giovanni. The following section will deal with his current team and the best counters.How to defeat Giovanni and catch Shadow Regigigas in Pokemon GO?Giovanni's team currently consists of the following critters:Phase 1: PersianPhase 2: Nidoking / Kingler / GarchompPhase 3: RegigigasThe best counters to it are as follows:Phase 1Mega Blaziken with Counter and Focus BlastTerrakion with Double Kick and Sacred SwordMachamp with Counter and Dynamic PunchLucario with Counter and Aura SpherePhase 2Mega Sceptile with Bullet Seed and Fenzy PlantKartana with Razor Leaf and Leaf BladeTangrowth with Vine Whip and Power WhipVenusaur with Vine Whip and Frenzy PlantMamoswine with Powder Snow and AvalancheWeavile with Ice Shard and AvalancheBaxcalibur with Ice Fang and AvalancheMega Glailie with Frost Breath and AvalanchePhase 3Mega Blaziken with Counter and Focus BlastTerrakion with Double Kick and Sacred SwordMachamp with Counter and Dynamic PunchLucario with Counter and Aura SphereGiovanni is relatively easier to defeat than the other GO Rocket leaders since his first and last picks are always constant. Incidentally, they are also weak to Fighting-types.Therefore, a team made up of two strong Fighitng-type critters and an Ice or Grass-type (depending on what his second choice is) should see you through this matchup with ease.Once you defeat Giovanni in this battle, you will get a chance to catch Shadow Regigigas in Pokemon GO.Alongside Shadow Regigigas, Shadow Lugia will also be available in 5-star Shadow Raids during this period.