The Magnemite was quite easy to model, it took less than an hour to make the model without the texture (Blender has a bolt generator script, so creating the bolts is quite easy). But I spent a lot of times searching good materials and textures until it looks real. Rendering take a bit of time too, my laptop took about 30 minutes to render the Magnemite's scene.
Kitsunoh took a lot more time to model. Organic shapes are difficult to model in 3D and yet the model is very simple, the fur hide some imperfectios of the model but I want to make a better body to Kitsunoh and recreate the fur to look more real.
Metang took about 2 hours to model, the problem was to deform some parts of its body. I used the same material for Magnemite on it, but changed some colors.