You can cut, copy, and paste animations of characters, skeletons, and other objects to objects in another scene.
One way is to export and import animation using the ANIM file format (see Import and export animation curves in .anim format). However, if you copy an animation to the keys clipboard, it stays on the clipboard when you select File > New Scene and File > Open Scene. This means you can retrieve a scene with animation, select a character and copy the animation, then retrieve another scene (with the same character in it) and paste the animation into it.
In summary, animation on the keys clipboard is persistent across File > New Scene and File > Open Scene, which means you can load a scene with animation and copy it, and then open another scene with the same character and paste the animation onto it.
