Pokémon GO: Liosta Leibhéal na Pokémon is Fearr

GBL Season 26 brought a move rebalance that redefined trainer battles with nerfs to Bastiodon's Smack Down in Great League, while others got buffed, such as Jellicent's Dazzling Gleam and Corviknight's Rock Tomb. Primal Groudon and Mega Rayquaza sit at the top of counter charts with the legendary Pokémon (Zacian, Zamazenta, and Regieleki) returning to raid rotation.

Mega Rayquaza remains the strongest Pokémon in Pokémon GO as Dragon Ascent delivers the highest Flying-type DPS, and Dragon Tail plus Breaking Swipe cover almost every raid boss. Both Primal Groudon and Primal Kyogre dominate as premier raid attackers in Pokémon GO, countering Fire, Rock, Electric, Steel, and Ground raid bosses across different raids between them.

The strongest Psychic-type is still Shadow Mewtwo with its versatile move pool that allows it to contribute across different matchups, while Crowned Sword Zacian is near unstoppable in Master League with the max CP, 11 resistances, and Behemoth Blade.

Mega Lucario tops the Pokémon GO attacker tier list for Fighting-types with a fast charging Counter, and a formidable Aura Sphere that delivers damage output rivaling legendary Pokémon. Origin Forme Palkia dominates Master League with Dragon Breath, Aqua Tail, and Spatial Rend. Zekrom covers Master League and excels as a raid Pokémon. These Pokémon to use are all reliable performers.

For defending gyms, Blissey, with its 496 base stamina, makes for an effective staller even in a disadvantageous matchup. Jellicent works well in the Great League thanks to its bulk and resistances. But if you need legendary Pokémon shinies, you can find those on igitems as well.

With 10 resistances, Metagross works well as a defender and ranks among the best attackers in the game, having the top Steel moveset available. These creatures in Pokémon GO aren't the strongest, but are all highly effective. They lose out to boss counters and others in terms of performance potential.

Garchomp serves as one of the best counters for Ground and Dragon raids with its powerful type combinations, but loses to Primals in DPS. Corviknight climbed Ultra League as a Flying/Steel type and pairs well with Zygarde, with excellent stamina in a Dragon-dominated meta. Azumarill is still a staple with a Water/Fairy typing.

The Pokémon available here are decent, but are now far outclassed by the list of the best options on this Pokémon tier list. Snorlax was a top gym defender, now overshadowed by Blissey, while Togekiss is a good gym defender but falls short against Dark and Electric. Florges works for Great League as a Fairy-type with Chilling Water, but its limited move pool and typing, combined with lower defense and stamina stats, lacks the impact of S-tier options like Mega Rayquaza or Primal Groudon.

Altaria was the go-to budget Dragon Pokémon, but new Pokémon in the game have pushed it out of competitive rotation. Furret has high stamina and a single weakness, but its mediocre damage nullifies that benefit. For most situations, your Stardust and Candy are better spent on many of the best Pokémon that outperform these options.