This is a detailed model of Bulbasaur I created to look like the official Ken Sugimori art. I did not bother with textures, so it is simple enough to print on most machines with support material, and it is quite sturdy. If you want it to look really nice, you can paint it!
Water-soluble support material is not strictly necessary, but certainly helps. My model was printed on its left side, but it can also be printed in nearly any position.