It's probably a PS, but I think I could grow a plant that looked very similar, assuming I had the same pheno, or another pheno with similar qualities.
I don't know how tall that one is supposed to be, but you could do one that would be about 20 to 25 inches. That bowl would be about 4 inches deep and 16 inches across and hold more soil than some grows i've seen. The stalk would be thicker than my thumb, and the buds three or four inches long. It's just a matter of trimming, training with wire and handling the roots right.
For bonsai; Grow in cold temps and plenty of light that would normally grow a plant squaty and bushy. Start it in a 12 oz cup cut in half and let it get to about 6 nodes, letting it get slightly rootbound. Cut the bottom three or four nodes off. Then tie/wire it so it grows slight crooked instead of straight up, or tape some styrofoam to the underside of part of the bowl so its crooked on the floor so there's about a 20 or 30 degree angle (if done this way, you'll of course need to do it till finished with each transplanted pot). Transplant it cutting the rootball a few times with a razor blade, and/or trim back the tips of the roots. Transplant to a small bowl and after a few more nodes develop cut two out of three and leave fan leaves. When you cut the nodes, leave a quarter inch of stem against the stalk. New nodes will probably grow out of most of these areas later.
After it's reached about 12 inches, transplant again and trim roots again,.. keep cutting it back. When it's ready to flower at about 14 to 16 inches, transplant to the final pot,.. same root treatment and you should have kept about 1 in 3 or 4 nodes,.. cut them all off to within half an inch of the stalk and leave the fan leaves. After in 12/12 for some time new nodes/bud sites will appear,.. Let a dozen of them grow and trim the rest. This will keep the buds close to the stalk, instead of getting long branches. Use wire so the buds grow outwards, and surround with CFL's.
After about 5 to 6 weeks flowering, it would look like that. It might take a couple of tries, but I'm pretty sure I could do it. Blueberry is not very tall to begin with and the buds are pretty big. Keeping it rootbound would keep it slightly shorter than it usually grows indoors. Nutes and watering have to be right of course, and the quality and quantity of light, and cooler temps than you'd normally use.
If that plant is supposed to be 12 inches tall or less,.. i agree, it's PS. But look at the wires, and that some of the buds are turned upwards. I think it might just be a creatively pruned 20 to 25 inch MJ plant.
