mstreurman: that's all purely for aesthetics. I'm aware of the "hold A" at game boot function. What I was curious about was the effect that resembles the booting of an NGC with no disk.
Machines running Dolphin 5.0-6467 x64 onward:
#1 Windows 8.1 x64 | Core i7-4770 @ 3.4GHz | GeForce GTX645 | 12GB (4*3) DDR3 #2 Windows 10 x64 | Core i5-6400 @ 2.7GHz | Radeon RX570 (main) + GeForce GT730 (alt)| 8GB (4*2) DDR4
#1 Windows 8.1 x64 | Core i7-4770 @ 3.4GHz | GeForce GTX645 | 12GB (4*3) DDR3 #2 Windows 10 x64 | Core i5-6400 @ 2.7GHz | Radeon RX570 (main) + GeForce GT730 (alt)| 8GB (4*2) DDR4