Convert Mascot Image to Outline Only

I need a skilled graphic designer to remove color from my mascot image and convert it to an outline only format. Removing all of the yellow and white but leavign all the black in the image. The final deliverable should be in PNG format with a transparent background.

Key Requirements:
- Proficiency in graphic design and image editing software
- Experience in converting images to outline format
- Ability to deliver high-quality PNG files