You need to develop similar characters (clones of a starting one) behaving in the same way (idle, running, falling, etc.), but do not want to animate each one independently. Is there a way to animate the first one and save the behavior, so as to animate the other characters exactly in the same way?
2is this 2D or 3D? where will this animation going to be created (which software)? The question right now is quite vague, check How to Ask and edit your question to add more details that will make it more answerable.– LucianoAug 28, 2019 at 12:30
1"Bone" animation softwares like Blender provide the ability to access animated bones as a separate file and then import them(Append) and be used in other character meshes(in same or different file) for reusability.The trick to reusing bone animations is to keep the bone names same across different bone armatures. ,– srt111Dec 26, 2019 at 12:25
You need dedicated software, for example, Cartoon Animator https://www.reallusion.com/cartoon-animator/ or a 3D program
Basically, you can animate the rig of the character and apply that to another one.
Each element of the animation, arms, legs, foot, hand, eyes, etc, are separated from each other and glued together by this rig.
Sometimes due to different proportions, you still need to adapt a bit the resulting animation.
Can it be done within Synfig? Jul 29, 2019 at 12:10
Hum... I do not use it...– RafaelJul 29, 2019 at 12:12
You can bone rig 2D sprites directly in Unity with the 2D animation package, or you can use Anima for the same purposes - though I don't know for sure yet if you can retarget entire animations to new meshes, I know you can save and load poses.
In Modo, my 3D DCC tool of choice, I can animate using IK & FK, save and/or export / import actors, poses, actions, and full animation sequences - both with the character mesh and without - I know Blender can do this too, and has some robust 2D tools these days.
Hope this helps.