How I created 'Young Speed-o'-Sound Sonic and Flashy Flash' (on paper)

Hello, there! Here is a short walkthrough of how I created my work 'Young Speed-o'-Sound Sonic and Flashy Flash'.
Paper drawing equipment:
Staedtler HB pencil
Staedtler colouring pencils
Sharpie markers
Paint 3D:
Oilbrush (background)
Pen (outlining and colouring)
Watercolour brush (eye colour and shading)