This is one of those pages that really shows all what you have learned from drawing so many pages for so many years.... But also in the writing. You are able to make up a rich story with so many elements well put together. Remember the times of the first pages of Double K? You have improved A FREAKING LOT. It's a pleasure to see your work and how you're getting better at it.
Now, if the radiation also gave him the power to fly, shoot lasers from his eyes, breath all eight standard fantasy elements (fire, ice, lightning, water, wind, earth, light, darkness), and pilot and even bigger giant robot dog, then he would be the best pet ever.