After defeating the Elite 4, go back to Mosedeep City and go into Steven's house. There will be a Pokeball on his table containing the Pokemon Beldum. Beldum evolves into a Metang at level 20.
You can't catch Metang in emerald. You can only get Beldum, and then you can evolve it into Metang.
at lv 45
At level 45.
It evolves at lvl 45.
Did you mean Metang? Because if that's the Pokemon your talking about it evoles level 45 into a Metagross.
metagross
Metang is a Steel and Psychic type pokemon.
Metang evolves into Metagross at level 45.
Metang evolves FROM Beldum at Level 25 Metang evolves INTO Metagross at Level 45
Beldum evolves at Level 20 into Metang. Metang evolves at Level 45 into Metagross. Also, if you have other questions about Pokemon, go to this website attached: http://www.serebii.net/index2.shtml This is the best website about Pokemon! I hope I helped!
Beldum evolve into Metang at lv20 and Metang evolve into Metgross at lv45
It evolves to Metang at level 20. Then, Metang evolves to Metagross at level 45.