>>44916102I think Bellossom can be many types, actually, including Grass/Fire, Grass/Fairy, and especially pure Grass.
Take a look at Oddish's dex entries.
RGB: During the day, it keeps its face buried in the ground. At night, it wanders around sowing its seeds.
Gold: Awakened by moonlight, it roams actively at night. In the day it stays quietly underground.
Silver: If exposed to moonlight, it starts to move. It roams far and wide at night to scatter its seeds.
Crystal: During the day, it stays in the cold underground to avoid the sun. It grows by bathing in moonlight.
Ruby: During the daytime, Oddish buries itself in soil to absorb nutrients from the ground using its entire body.
Sapphire: Oddish searches for fertile, nutrient-rich soil, then plants itself. During the daytime, while it is planted, this Pokémon's feet are thought to change shape and become similar to the roots of trees.
Emerald: This Pokémon grows by absorbing moonlight. During the daytime, it buries itself in the ground, leaving only its leaves exposed to avoid detection by its enemies.
Game Freak gave the same dex entry told in multiple ways on purpose. Oddish and its evolutions naturally prefer moonlight. While Gloom can technically tolerate the sun now compared to Oddish, and it is no longer avoiding sunlight, it has a natural inclination towards moonlight.
How strange for this Pokemon, Gloom, to choose the Sun Stone to evolve into Bellossom, and not the Moon Stone. I find it quite perplexing or at least amusing that a Pokemon that chose moonlight over sunlight, would biologically respond to a Sun Stone and not a Moon Stone to evolve.
I feel like multiple types might fit Bellossom, but it being pure Grass and having that distinction of losing its secondary type after evolving is characteristically Oddish. It's a series of contradictions.
Oddish is an odd radish. Its Japanese name is Nazonokusa (nazo no kusa, or enigmatic grass). This Oddish family is meant to be absurd and strange.
