Competitive Landscape
The Ultra League is a popular PvP format in the game Pokémon GO, where the maximum CP for Pokémon is 2,500. Due to this restriction, many powerful Pokémon that are used in other formats are not as effective in the Ultra League. As a result, a unique set of Pokémon that excel in this format have emerged. Giratina-Altered, Cresselia, and Swampert are widely considered to be among the best Pokémon to use in the Ultra League.
Value Proposition
Giratina-Altered is a Dragon/Ghost-type Pokémon with a powerful moveset that includes Dragon Claw and Shadow Sneak. It is weak to Fairy-type attacks, but it has high HP and Defense stats that make it difficult to take down. Cresselia is a Psychic-type Pokémon with a moveset that includes Moonblast and Future Sight. It is weak to Dark- and Ghost-type attacks, but it has high HP and Defense stats that make it difficult to take down. Swampert is a Water/Ground-type Pokémon with a moveset that includes Hydro Cannon and Earthquake. It is weak to Grass-type attacks, but it has high Attack and Defense stats that make it a powerful offensive threat.
Nuanced Evaluation
While Giratina-Altered, Cresselia, and Swampert are all excellent choices for the Ultra League, they each have their own strengths and weaknesses. Giratina-Altered is the best overall choice due to its powerful moveset and high HP and Defense stats. Cresselia is a good choice for players who want a more defensive Pokémon, while Swampert is a good choice for players who want a more offensive Pokémon. Ultimately, the best choice for each player will depend on their individual playstyle and team composition.