It's his own original cartoon style. He's a creative individual who thinks for their own unique way of drawing. Try developing your own style because you will always feel inferior to the person youare emulating.
It's fine to use other styles as inspiration to create your ow style. I mean, artists take years falling into a drawing style that is comfortable and specifically tailored to their skills, so chances are even highly skilled artists will have trouble copying other styles. Just find what works for you