Pokemon that evolve from friendship

How exactly could I evolve a pokemon that evolves from friendship? For example Pokemon like Buneary and Riolu have to evolve by high friendship, how exactly would that work out here?

We don't have a set system for it, but the best way is to RP with that Pokemon in its base form for a while, then ask your Mod to then evolve it when they believe a big enough bond has been made. I've done this method with my trainer Yoku's Togepi, that's now a Togetic ^^