From Bulbapedia, the community-driven Pokémon encyclopedia.
Gloom can evolve into either Vileplume or Bellossom through different methods.
This is a list of Pokémon which evolve differently depending on certain conditions. To date, no Pokémon whose pre-evolution has a branched evolution also has a branched evolution; Wurmple is the only Pokémon with a branched evolution whose evolutions can evolve again.
The branched evolutions of a family often have different strengths in their base stats. In some cases, certain stats may be exactly the same, with the rest being distributed differently depending on the branch. One example of this is Gardevoir, with 65 for its base Attack and 125 for its base Special Attack, while Gallade's Attack and Special Attack are instead 125 and 65; the rest of their stats are exactly the same. A broader example is the Eeveelutions, whose stats all use the same numbers in different orders.
The majority of evolutionary families that have a branched evolution have only two evolutionary stages. Many evolutionary families with branched evolutions only gained a branched evolution in a generation after the family was introduced; for example, Kirlia was introduced in Generation III along with its evolution Gardevoir, and Kirlia's alternate evolution, Gallade, was introduced in Generation IV.
Pokémon that have branched evolution