Animal Crossing × Mario Kart 8
From the Super Mario Wiki
Animal Crossing × Mario Kart 8 (called Animal Crossing: New Leaf × Mario Kart 8 up to November 2014) is one of three downloadable content packs available for Mario Kart 8, the others being Mercedes-Benz × Mario Kart 8 and The Legend of Zelda × Mario Kart 8. Originally scheduled for release in May of 2015, it was later pulled ahead to an earlier release date of April 23, 2015.
Like The Legend of Zelda × Mario Kart 8, this pack contains three new characters, four new vehicles (2 karts, a bike, and an ATV), a new set of tires, a new glider, and two new cups with four courses each.
These characters may appear as CPU racers when the DLC has been bought. Additionally, in online races, players that have not purchased the pack can see other players use these characters.
If both The Legend of Zelda × Mario Kart 8 and Animal Crossing × Mario Kart 8 are purchased, either separately or as a bundle, the player instantly receives eight new color swaps of both Yoshi and Shy Guy. Neither Yoshi nor Shy Guy appear as computer racers in these alternate colors. The following colors are included: