Characters Main Characters Chris Kratt Martin Kratt Aviva Koki Jimmy Z. Villain Characters Zach Varmitech Donita Donata Gourmand Dabio Wild Kratts Kids Ellie Gavin Jenny Katie Kenny Nina Nolan Patricia Ronan Sani Other Characters Great Great Granddaddy Gourmand Mom Kratt Shabio Shonita Donata Episodes Season 1 Season 2 Season 3 Season 4