Check out Knuckles 02 Low-poly 3D model on CGTrader for $4. High-quality mesh by sergeyanzurov011: 2296 polys, 2286 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 1.1 MB), OBJ (OBJ, filesize: 304 KB), FBX (Autodesk FBX, filesize: 182 KB), GLTF (glTF, filesize: 16.7 MB), DAE (Collada, filesize: 604 KB), TEXTURES (Textures, filesize: 16.1 MB), STL (Stereolithography, filesize: 224 KB)