Unown doesn't evolve into anything...yet.
THEY DONT EVOLVE
unknown evolves into unknowner at level 67
Nothing
If you are talking about Unknown, the Pokemon, then no, it does not evolve. But there are many different types of Unknown
That is unknown.
Episode 528 (Journey To The Unknown!)
yes it does and it has.. but it is unknown if it will evolve into the last form most likely it will like all bird Pokemon ash captures
You have to evolve Litwick. You can get Litwick at Celestial Tower.
Chimchar evolves into a Infernape at lv.17. Infernape evolves into a Monferno at lv. (unknown)
None, you have to give it the item upgrade and trade it to make it evolve.
As far as I am aware the Pokemon unknown do not evolve. They are just a Pokemon that has several different shapes. These often look like letters and can be collected to form an alphabet.
No, Maractus doesn't evolve.