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I'm trying to achieve non-realistic bouncy physics, specifically for ears and tails like the physics shown in these example Example 1 Example 2

I've tried with the spring bones addon and blender's default soft body & clothes but I haven't been able to achieve something close to that bouncy-floating style of physics. Any help or suggestions with this are highly appreciated!

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I realize that my first answer may be buggy (or at least I need to fix the issue), so here are 2 alternatives, with or without addon, I don't know if it will fit your needs though, as you ask for realism:

With the Wiggle Bones addon:

  • Create your mesh and armature. Download the Wiggle Bones addon created by Shteeve here. In Pose mode, select each of the ear bone and go in the Properties panel > Bone and enable the Wiggle Bone option, play with the parameters.

enter image description here

Without addon:

  • Create an edge, each of its vertex must stick to each bone's head and tail. Assign it a vertex group, the bottom vertex must have a weight of 1, the second a weight of 0.7, the last one a weight or 0.2 or 0.1.
  • Give this edge a Physics > Cloth and in the Physics Shape panel, choose the group as Pin Group.
  • Create an empty for each vertex, parent each empty to its vertex (select the empty, shift select the edge, go in Edit mode, press CtrlP > Make Vertex Parent).

enter image description here

  • Give each bone an IK constraint and give it as Target the empty its pointing to. Choose a Chain Length of 1.
  • Parent the edge to the head bone.

enter image description here

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