He has worked across various creative disciplines, including graphic design, industrial design, interior design, and illustration. Mariscal is particularly famous for his colorful and expressive style, often blending elements of pop art, surrealism, and modernism in his work.

One of his most iconic contributions is the design of the Cobi, the mascot for the 1992 Barcelona Olympic Games, which became a symbol of the event and showcased his signature bold, cartoonish aesthetic. His design philosophy emphasizes creativity, humor, and experimentation, often pushing the boundaries of conventional design to create works that are both functional and visually engaging.

Mariscal’s work spans a wide range of products, from furniture and home accessories to public installations and illustrations. He is known for his collaborations with prominent brands such as Vitra, Alessi, and Moroso, and his designs often feature a mix of organic shapes, bright colors, and playful forms.