To beat Moltres in Pokemon Go, players should use Pokemon that are strong against its Fire and Flying type. Here are some tips and counters from the search results:

• Weaknesses: Moltres is weak against Electric, Rock, and Water-type Pokemon.
• Counters: Some of the best Pokemon to use against Moltres include Mega Diancie, Mega Tyranitar, Mega Aerodactyl, Shadow Tyranitar, Rampardos, Rhyperior, Gyarados, Zapdos, Raikou, Terrakion, Electivire, and Kyogre.
• Moveset: Moltres can use a variety of Fast and Charged moves in Pokemon Go, including Fire Spin and Overheat.

Its important to note that Moltres is a Legendary Pokemon, so it will appear in five-star raids. Depending on the strength of a players Pokemon, they may need to team up with other trainers to defeat it.