1. Squash and Stretch
  2. Anticipation
  3. Staging
  4. Straight Ahead Action and Pose to Pose
  5. Follow Through and Overlapping Action
  6. Slow In and Slow Out
  7. Arc
  8. Secondary Action
  9. Timing
  10. Exaggeration
  11. Solid Drawing
  12. Appeal

As found on Wikipedia

Twelve Principles of Animation in the game Darkstalkers

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