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.

Bullet Oil
Bullet Oil is a sponsor that appears in Mario Kart Wii. It seems to be an oil company with some relation to Bullet Bills and the tagline "King of Speed". The logo consists of the word "Bullet" in a green serif font and "Oil" in a matching white font, with a shadow effect behind both words. The sign features the tagline in a black font with a star shape integrated into each of the letters, with the logo on the bottom right underneath "Speed". A Bullet Bill artwork with a pink and green trail on a deeper pink background with occasional groups of three paler stars. It is advertised by means of signs.

Café de Mario
Café de Mario is a sponsor that appears in Mario Kart Wii. Presumably, it is a café run by Mario which sells Fruit-related products. The logo consists of the name in a dark grey sans serif curved around the outside of a white circle, with images of some Bananas and a Pineapple from Super Mario Sunshine in the middle. It is advertised by means of cafés.

Coco Coffee
Coco Coffee is a sponsor that appears in Mario Kart Wii. Presumably, the sponsor is a brand of coffee which also has some of its own coffee shops. The main logo consists of the company name in a white script font with some of the letters joined up. A variation of this logo appears on the signs outside the stores, which feature pale swirls behind the writing and a small dot in the bottom left and top right corners with a green and turquoise gradient background. Another version appears on the poster for the coffee, which features the text in front of the body of a Mii wearing a red top and a brown glove holding a purple mug of coffee. The face of a random Mii on the player's system will be used for the model on the poster and will change every time the course is played. A jar of the coffee appears above the mug, which is roughly trapezium shaped with turquoise at the rims and beige on the rest. A green palm tree, three brown coffee beans and a brown version of the logo also appear on the jar. The background of the poster is made up of waves of various pinks purples and browns. It is advertised by means of shops and posters.