Male Combee are not known to evolve into or from any other Pokémon.

Which Combee can be evolved?

Combee is a Bug, Flying-type Pokémon from the Sinnoh region. Female Combee evolves into Vespiquen when fed 50 candies while male Combee does not evolve into any other Pokémon.

What does female Combee evolve into?

Once you have a female Combee, all you have to do is level it up to level 21, and it'll automatically evolve into Vespiquen.