What are "Late Bloomers" Pokémon?

In the Pokémon series, "Late Bloomer" Pokémon refer to those that require two evolutions and belong to the "Slow" experience group (requiring 1.25 million experience points to reach level 100). Their final evolution forms have a base stat total of exactly 600, making them comparable in battle strength to legendary Pokémon. However, due to their high evolution requirements and slow leveling, they often don't reach their true potential until the late game. In unofficial terminology, these Pokémon are also called "pseudo-legendaries," "600 club," or "pseudo-legendary Pokémon."

The Japanese name for this designation is "大器晩成" (Taiki-Bansei), directly borrowed from the Chinese idiom meaning that things with great potential only fully manifest their power at crucial moments. The official term has been used in Pokémon Center merchandise "Late Bloomer" series, specifically referring to these Pokémon.