First, start out with basic shapes. Draw two circles, on for his head and the other for his body. Next, you wanna draw the face guidelines for his head. Then, draw the other guidelines, which includes his three spikes,his legs, his arms, and his tail.
Next, you want to find the middle of the guideline for his head and draw a 'heart-shaped' nose.
After you have the nose, the next step is to draw his mouth. For his mouth, you will have to draw it kind of a 'half-moon' type. After that, draw his tongue and his buck teeth.
Now, draw his eyes. His eyes need to look like Pac-man's eyes. Also, draw them on the top of the face guidelines like so.
For this step, you will need to draw his head. First start to draw the ears. Now, draw the spikes. Remember, do not draw the spikes too big or too long. This is like a 'chibish' version of Sonic the Hedgehog, so keep to spikes small.
Let's go ahead and draw his body. Now remember to draw his body, including his arms and legs, like the characters in Happy Tree Friends.
This is the last step on drawing this tutorial. Finish his body and you will be done!
Good job everyone! You have now successfully drawn Sonic the Hedgehog in Happy Tree Friends form. Color him in and you are good to go!
Optional: You can add his shoes and gloves and his hands if you want. I just did to make it look like him.