It's very hard, yet possible, to do this in realtime when on PAL. The differences in event timing allow for a significant margin of error there. There's no such margin on NTSC, that's why it hasn't been discovered until recently.
Yeah, he will be there in the condition you left him. That is, the door will close and you'll have to escape him once again or fight. He will disappear only when the planet will start blowing up.
Alright, I've found a way to make it faster. Apparently, you don't even need to jump on the statue's head. (Also, now it doesn't require Snes9x 1.51 anymore.)