Isabelle

Isabelle is a dog character from the Animal Crossing series who originally debuted in the 2012 Nintendo 3DS game Animal Crossing: New Leaf, serving as the Villager's secretary.

Super Smash Bros. for Nintendo 3DS / Wii U
Isabelle appears in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U as an Assist Trophy. She tosses fruit at the player that summoned her, which heals them when touched. Opponents can also be healed if they come into contact with the fruit. She cannot be attacked, but she flinches if opponents get too close. If the player that summoned Isabelle is knocked out, she will hunch over with a saddened expression until they return. In addition, an Isabelle costume for the Mii Fighters was released as DLC.

Super Smash Bros. Ultimate
Isabelle returns in Super Smash Bros. Ultimate, now as a playable character. She appears to be a similar fighter to Villager, having attacks that appear to function similarly but are aesthetically different (such as having Tom Nook, Timmy, and Tommy build the Town Hall around an opponent in her Final Smash (which appears to function similarly to Villager's Dream Home)). One of her attacks has her shoot Lloid upwards.

Mario Kart 8 / Mario Kart 8 Deluxe
Isabelle makes an appearance in Mario Kart 8 as one of the characters included in the Animal Crossing × Mario Kart 8 downloadable content pack, marking the first time she is playable in any game. She is one of the heavier lightweights in the game. As such, her acceleration, handling, and traction stats are lowered a little to boost her speed and weight, her stats are identical to those of Toad, Koopa Troopa, Shy Guy, Lakitu, Toadette, Larry, and Wendy. Her signature vehicle is the City Tripper. Like the other lightweights, she has a small body frame. Her kart symbol is an apple.

Isabelle returns in the Nintendo Switch port Mario Kart 8 Deluxe, where she is included in the base content and is available from the start. She now shares stats with only Toadette and Wendy.

Super Mario Maker
Isabelle makes an appearance in Super Mario Maker. If an Isabelle amiibo is scanned with the, the sprite of Mario will be replaced with a sprite of Isabelle. This only applies in levels using the Super Mario Bros. graphical style; other styles display Mario's standard appearance.

Trophy information from Super Smash Bros. for Nintendo 3DS / Wii U
Red indicates exclusive to the Nintendo 3DS version. Blue indicates exclusive to the Wii U version.