Many Pokémon have small differences that you might not immediately notice, including visual differences based on gender. Combee is one such Pokémon, and at some point you'll need to get a female Combee in Pokémon Go for your Pokédex, which can be trickier than you think.
Brand New GLOSSY Combee for Men and Women
Combee is one of several Pokémon that operates with a distinct difference between its male and female variants. If you ever want to evolve your Combee into Vespiquen, you'll need to catch a female Combee, which isn't a guarantee in any Pokémon game. For Pokémon Go, we have a breakdown of how likely you are to find a female Combee , so here's how to increase your chances of that encounter.
When Combee first came to Pokémon Go on January 31, 2019, Niantic had female Combee spawn rates of 100 percent for two weeks. Male Combee was added on February 15, and since then, the spawn rate has been more favorable to the male variant, just like in the main game.
In keeping with the lore of female Combees becoming the queen of a hive, male Combees have an 87.5 percent spawn rate compared to their female counterparts. That means you have a 12.5 percent chance of encountering a female Combee in Pokémon Go, according to Bulbapedia. There's no way to increase these odds unless Niantic increases the spawn rate of female Combees during an event.