Hello Dark Cloud, thank you for writing in.
We don't have the ability to retarget animations from one skeleton to another, though you can use skins to reuse animations on the same skeleton with different looks.
http://esotericsoftware.com/spine-skins
Skin constraints allow you to move bones based on the skin:
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Let us know if this helped with your request; if not, please let us know and we'll be happy to help further!
