Stage updated, made a slight change to snow animation. Thanks GLB for the help and tips. Still, the stage isn't really accurate. Please read the description.
Didn't test the updated version, but the one I have has different values for screenleft and screenright, giving strange effects of chars sliding if both chars are on the opposite side of the screen and one tries to walk out of the screen.Set both values to 25 or even a little less (default is 15 I think).
Update still lacks that, didn't catch that before while testing my apologies. Seems you have this on other stages as well. Change it to 25 (or 15) as Cybaster suggested.