Air taxi First Officer reported that the aircraft stalled 50 feet over the runway during landing and bounced before stopping.

Narrative

Flying night approach into ZZZ; PIC was PF and I was PM. PIC had been expressing concern about possibly needing to taxi on 'narrow taxiways' and/or 180 turn on narrow runway. PIC had recently taxied different aircraft off a taxiway and got the wheels stuck in mud so this was weighing on him. He kept saying he thought it was important for us to land as short as possible and stop in time to exit at a taxiway about halfway down the runway that went straight onto the ramp. Upon commencing with the visual approach the PF was soon low and slow. I; the PM; alerted him to to this and he stated that he was correcting; which I did see some attempt to correct. The approach continued and he was again low and slow; 4 reds on the PAPI; and just above Vref where he should have been at least 10 knots faster than that. I alerted him and he stated that he was correcting. The approach continued when I noticed we were passing over and near trees close to the perimeter of the airport. I looked down and we were well below Vref and with a shallow descent. Before I could say something the stall warning and stick shaker activated and the airplane sank the last 50 feet or so landing on or near the numbers of the runway and then one bounce before coming to a stop. No damage or injuries.