According to an official poll conducted by Pokémon GO developer Niantic, most players think Team Mystic will throw Poké Balls most accurately during the first-ever Solstice Event. You can check out the complete results in the embedded tweet below. As part of the Solstice Celebration, hot Fire-type Pokémon such as Charmander, Typhlosion, Houndour and Charizard, as well as chilly Ice-type Pokémon such as Sneasel and Lapras are appearing more frequently until June 20. Plus, you can get massive XP boosts when you accomplish certain actions in your game. For example, catching a Pokémon with a Curveball throw will reward you 30 XP instead of the usual 10 XP. Finally, Lucky Eggs are 50 percent off in the in-game shop all week long.
Source: @PokemonGoApp