Cestus Dex #001, Tadsprout the Tadpole Pokemon. Newly-hatched Tadsprout spend the first few weeks of their lives high in the treetops in pools of water trapped by giant bromeliads. When their legs grow large enough to walk, they waddle over the edge of the flower. Instead of plummeting to the ground, their tails make them spin like a maple seed, slowing their descent, and they land safely on the rainforest floor.
Because Tadsprout are incredibly hardy and naturally docile, they're a popular choice for beginning trainers.