No idea if it was suggested before, just have used the search box but nothing.
So as the title say, what about a function that allow you to mark, check, star (whatever) a Pokemon on a GTL, in case you want to keep looking for Pokemons, but in case u don't find anything go for the pokemons u have checked.
Also adding a "Favourites" tab or something to this would be nice.
Gonna provide some mockups later.
Checkbox to make a Pokemon appear on Favourites tab: