yes
The evolved form will stay shiny forever.
They stay shiny no matter what,even if they evolve.(I know this because I caught a shiny slugma and I evolved it into a shiny magcargo.)
yes they do
Yes.
If your Infernape is not shiny to begin with, it will not evolve into a shiny Pokemon.
A Roselia.It doesn't matter what level i think. Togetic is also evolved into a togekiss.
YES
yes, shiny Pokemon will stay shiny forever, even if they evolve.
To evolve a shiny golbat you must first befriend it. Once befriended level it up and it will evolve into a shiny Crobat.
you can evolve Roselia
No. To evolve a Pokemon with a shiny stone, it has to be in your bag, and then you have to use it on the Pokemon you want to evolve.
No, each Pokemon either has the quality of "shininess" or it doesn't. Evolving your Pokemon doesn't change this, meaning that evolving non-shiny Pokemon cannot result in a shiny Pokemon, nor can evolving a shiny Pokemon result in a non-shiny Pokemon.