No.
Altaria does not evolve again.
Pokemon you recruit can evolve after beating Wigglytuff's Guild, but your character and your partner cannot evolve until you beat the post-game storyline involving Darkrai. After you beat him, then you and your partner can evolve.
to evolve onix into steelix all u have to do is buy a metalcoat from the shop then go to my team and attach it to him.then trade it to someone and tell him to trade it again for you.then u have steelix!!!hope this helped you!!!
No.
Staraptor cannot evolve again.
yes beat the indigo plateu again
if u can't find a dragon type Pokemon u can evolve a trapinch and evolve it in to a vibrava and evolve it again in to a flygon
catch a machop the evolve it. To evolve it again trade it with someone.
Yes
yes you can. you can fly back to the indigo plateau and then you can enter the Pokemon leagues again.
Lumineon is a final-stage pokemon. It cannot evolve again.
Yes, if a Pokemon was supposed to evolve at level 18 but you catch it at level 40 like a Pidgey, if you level it up again it will evolve, this will happen again every time you up its level if you press B during the evolvation.