When retopologizing creature 3D models in Blender, the best tools are the Retopology workspace (for guided mesh building), Decimate Modifier (to simplify high-poly sculpts), and manual edge tools (Pen, Loop Cut)—all essential for organic edge flow that keeps meshes animatable and lightweight.
The Retopology workspace helps build precise base meshes, while the Decimate Modifier trims detail without losing creature features like limbs or facial structure. Manual tools let you refine edge loops for animation, and Snap to Surface/Poly Build add precision and speed.
For beginners, start with Blender’s "Retopology Basics" tutorial, practicing on simple parts (e.g., a tail) before full creature models.