On this site and probably also elsewhere A Link to the Past is considered a console game. For it was on the SNES it was originally released. But some might argue that (that it should not only be considered a console game)? There is an extra dungeon in the GBA version after all.
I guess I´ll go with the flow here, LA and OoA are the most difficult and time consuming games, but OnoX is the hardest boss you´ll ever encounter in a handheld Zelda!