Blender Shape Key Basics: Everything you need to know!
Merging multiple OBJ files into one file with shape keys - Blender Stack Exchange
How to Merge Objects in Blender: 3 Simple Methods
Blender Pipeline #4 - Combining Facial Shape Keys & Armature Animation in Blender with Auto-Rig Pro - YouTube
keyframes - Is it possible to combine shape key values from different objects? - Blender Stack Exchange
combine two shapekeys ? - Modeling - Blender Artists Community
Combine shape key and armature animation in Blender for use in Unity - tutorial - YouTube
How to combine multiple shape keys into a single shape key - Blender Stack Exchange
mesh - How do you join two models together without messing up existing shapekeys? - Blender Stack Exchange
Combine or Merge Shape Keys into New Shape Key | Blender Tutorial - YouTube
GitHub - BlenderNewbie2020/Blender-Merge-With-Shapekeys: Small script for Blender 2.79 to merge two objects, adjusting the shape keys of the second (active) object.