I presume you have misspelt Boldore in your question. Boldore does not evolve at a level but when traded for any pokemon. It evolves into Gigalith, the one who receives the Boldore in the trade keeps it unless it is traded back.
You have to trade it to evolve. Trade with somebody then it evolves, then trade back to you. There your bolder evolved. Hope this helps!
well it evolve at level 30 .
level 48.
level 30
level 56
Level 48
at level 55
Level 40
Kecleon can't evolve u can catch kecleon a level 30 but he dose not evolve
Shellos evolves into Gastrodon at level 30, but Gastrodon does not evolve.
it evolves at level 54
feebas could evolve at any level but it evolves by happiness