List of sponsors debuting in Mario Kart Wii

This a list of the sponsors that have only appeared in Mario Kart Wii. For sponsors that have appeared in at least one other title, see the List of recurring sponsors in the Mario Kart series.

1-Up Coffee
1-Up Coffee is a sponsor that appears in Mario Kart Wii. Presumably, it is a coffee company that produces coffee from or using 1-Up Mushrooms that is named after them. The main company logo consists of the company name in an all capitals sans serif font with a gradient fill and both a white and brown outline, with "1-Up" having a green fill and "Coffee" having brown. In-between the two words is an artwork of a 1-Up Mushroom from New Super Mario Bros. with a brown outline. The background of the logo is a brown gradient made up of circles, and the whole logo has a brown curved outline. The other logo uses the same layout as the first, but instead uses white outlines and teal gradient text. The background of the logo is made up of teal stripes. It is advertised by means of trackside banners and shops.

Aquarium
Aquarium is a sponsor that appears in Mario Kart Wii. Presumably, it is the body of water seen around Chain Chomp Wheel containing Unagi and Cheep Cheeps. The logo consists of the word "Aquarium" written in an all capitals perspective font with a pink and white gradient fill and a teal glow effect. The Mario Party 8 artwork of a Chain Chomp appears behind the text on a blue background with pale blue horizontal stripes surrounding the Chain Chomp. It is advertised by means of posters.