So non repeating random. This plugin may be of use
First though, some advice setting up. Are your Sprite objects unique in that they need to be separate objects? This will be significantly simpler if you were able to use one object with 100 different animation frames as opposed to 100 different Sprite objects.
Otherwise I think you may need an event for each unique object. Roll a value from 1 to 100, if 1, create object a, if 2 create object b, ect...
Edit: let me know if you want to avoid using plugins, a similar way to get non repeating integers from a range can be done with arrays as well, but it will be more complicated. Still relatively simple if you are comfortable with arrays though.