Sprites all have separate scripts. You can duplicate sprites which will copy all the costumes and scripts from one sprite to another. You can also clone sprites in version 2 where you have an extra event “when I start as a clone”. Perhaps you can provide some more information about what you're trying to achieve?
Best to start your own topic. I can't get two sprites to be on stage at once. Please help!
Make sure both sprites are told to show and one isn't hiding behind the other.
NB I'm assuming these are separate sprites and not just two costumes of the same sprite.