The Seasonal Series are a set of gashapon figures featuring Pokémon in various seasonal activities, each set with a specific theme.
Four sets are known.
ポケモン ぬくぬくタイム or Nuku Nuku Time, meaning Warm Time. The theme is yarn.
ポケモン ぽかぽかびより or Poka Poka Biyori, meaning Pleasantly Warm Weather. The theme is flowers.
ポケモンぎらぎらサンシャイン or Gira Gira Sunshine, or Dazzling Sunshine. The theme is beach balls/swim rings.
Titled Playing in the Fallen Leaves. The theme is, of course, playing in fallen leaves.