In addition to Imageepoch handling animations, a few Nintendo employees from the New Super Mario Bros. team helped Arzest out on the game.
Nintendo developers from the New Super Mario Bros. series helped out developer Arzest on Yoshi's New Island.
In addition to Takashi Tezuka, the legendary Nintendo developer who produced all of the New Super Mario Bros. and Yoshi's Island games, some of the developers include:
The development studio Imageepoch helped on Yoshi's New Island as well, specifically with animations. Imageepoch has previously worked on Arc Rise Fantasia (Wii), the Luminous Arc series (DS), and more.
The main developer on Yoshi's New Island is Arzest, a studio made up of former Artoon employees, which is in turn, made up of former Sega employees. Artoon developed Yoshi's Island DS, FlingSmash, and more with Nintendo. The director of Yoshi's New Island is Arzest's Masahide Kobayashi. You can read more about him in our profile on him.