Isabelle

Isabelle is a dog character who helps carry out the duties of the mayor in Animal Crossing New Leaf.

Mario Kart 8
Isabelle appears in Mario Kart 8 as a DLC character part of the Animal Crossing: New Leaf x Mario Kart 8 alongside the Villager and Dry Bowser.

Super Smash Bros. 3DS/Wii U
Isabelle appears as an Assist Trophy in Super Smash Bros. 3DS/Wii U.