My Serial plotter isn't working (arduino)
You must have each set of data point (or points) on a separate line and if you are plotting more that one value you need a space or a tab between each value.

So to have 3 lines on your plot, I think you want this:

 Serial.print(AnalogIn_Val0);
 Serial.print(' ');
 Serial.print(AnalogIn_Val1);
 Serial.print(' ');
 Serial.println(Pwmout_Val);


The output in the serial monitor should be something like this:

123 456 789
234 567 901
...