Look, it’s not all doom and gloom. Sometimes things are odd, sometimes things are vile. I’m, of course, talking about the Gloom evolution line. Oddish is a cute little thing, and Vileplume is one of the best grass-types in Kanto, then Gloom is just kind of there. It’s for sure the final product that you’re after with this Pokémon, so allow us to tell you how to evolve Gloom into both Vileplume and Bellossom.
Though they get their start as grass Pokémon in gen 1, Gloom’s evolution line picks up the poison Pokémon typing down the road, too. As such, we suggest you learn about the grass Pokémon weakness and poison Pokémon weakness to learn how to combat them. We suggest you take a look at Ralts’ evolution and Girafarig’s evolution for this, as psychic Pokémon are especially effective against Gloom and its various stages.