Toondoku, released in 2007 for the Nintendo DS, is not your traditional Sudoku puzzle game. Developed by Dragon's Den Unlimited, it combines the classic number-based Sudoku puzzle format with fun and engaging cartoon images that replace the familiar digits. Players solve puzzles by using images of foods, animals, and other cute figures instead of numbers. The game genre is primarily puzzle, but with a unique twist that appeals to both traditional Sudoku fans and younger audiences looking for something different. It features various difficulty levels and an assortment of puzzle challenges to keep players entertained.