Unnumbered cards from sets doesn't happen outside Japan... Either they have a number, or they don't have a set at all (such as the energy included in pre-Generations Elite Trainer Boxes).
I mean, it's possible that there's secret rare energy, which also wouldn't be listed, but that's never happened either. (Even the Call of Legends energy was at the end of the numbered set and not beyond it.) (Looking at PTCGO, this isn't actually a possibility.)
Realistically, we're well beyond the point where they need to include generic basic energy in booster packs. It's an inefficient way to collect it, and doesn't really add anything. (Hence why most of the time when this is done, it's got a unique art. XY being the one exception beyond Gen 2, where they reprinted energy in practically every other set. Technically Call of Legends' wasn't unique, either, but it also wasn't the stock energy. ;p) They have things like the Elite Trainer Boxes and deck tins these days for people to get energy if they can't get it from their local league anyway, and they've specifically ruled that basic energy is never out of rotation, so it doesn't "need" to be included in sets like it may have in the past.