Yeah I know it looked jacked up and one pichu is larger than the other one. I draw with a mechanical pencil because I don't have an actual set of pencils of varying coding yet. I try but I'm not the best artist in the world (probably the worst out there)
It's not a bad picture, but it rather suffers from wonkiness. Like the way one of Pikachu's eyes is considerably higher than the other one, making him look a little, erm, constipated.
What you could do is use much, much paler light pencil lines to check the positioning of important details like eyes, nose, and mouth before you shade it in. In general it looks as though you're using a pencil that is far too difficult to rub out - a 2B or something, when you should be using a sharpened H or HB for drawing. The 2B is great for blocking in black areas, but you shouldn't be using it to draw with.