The world of Pokémon GO is ever-evolving, but some aspects like the PvP battles in the Go Battle League (GBL) remain a constantly engaging component of the game. The key to success in these battles lies in smartly assembling your team to exploit the elemental weaknesses and strengths of potential opponents. As we dive into the best Pokémon GO League team combinations, we have to consider that what might be best at the moment could change with updates and the introduction of new Pokémon. But certain combinations have proved consistently effective across various leagues.

In the Great League, where you’re limited to Pokémon with 1500 CP or less, an ideal team might include Skarmory for its great defense and type coverage, Swampert for its power moves like Hydro Cannon and Earthquake, and Altaria for blending high defensive stats with Dragon Breath’s fast energy gain. This combination offers coverage against a broad range of types, with each Pokémon backing up the others’ weaknesses well.

The Ultra League ramps things up with a 2500 CP limit, allowing for beefier contenders. Here, Giratina (Altered Form) is a powerhouse given its Ghost/Dragon typing and defenses. Pair Giratina with Registeel to cover its weakness against Dark-types while handling Fairy- and Ice-types threatening Giratina. Finally, Cresselia or Swampert can round out this team by providing additional coverage against Fire-types that threaten Registeel and Ice-types against Giratina.

For those aiming high in the Master League without any CP cap, teams often feature legendary and pseudo-legendary Pokémon. A trio that stands out includes Dialga for its unique Steel/Dragon typing making it only weak to Fighting- and Ground-types; Melmetal provides excellent damage output and resists Flying- and Psychic-moves; Togekiss as a Fairy/Flying-type can counter potent Dragon-type attacks while dishing out significant fairy damage.

Each league has countless viable team combinations, but these selections focus on versatility and covering as many elemental bases as possible—essential in dealing with the surprises GBL can throw at you. Remember that teamwork in Pokémon GO goes beyond individual stats or types; it’s about how well your trio complements each other to face any challenge thrown your way. Happy battling!