|Kirby Cat in When Children Must Be Grown-Ups|
|First Appearance||"When Children Must Be Grown-Ups"|
|Voiced By||Naoko Watanabe (Japanese)|
He appears as one of the main antagonists in "When Children Must Be Grown-Ups" when he continuously pulled the Maple Town Train's whistle. The other Maple Town children look after him. He caused multiple aspects of mischief such as messing up the mail letters in the Rabbit Family household and pushing a boulder down the hill at Bobby Bear. This continues to the point where he begs for Barney Bulldog to arrest him for his behavior. He also has a bag containing various possessions such as a picture of his grandmother (referred to as his "treasures").
He is a tan and brown tabby cat with whiskers and black beady eyes. He wears a white and shirt with a yellow-green trim and large horizontal stripe, red pants, and brown shoes.
Kirby is normally mischievous, constantly causing trouble wherever he goes. However, it is soon revealed that he has a soft side as well, which Patty Rabbit discovers when Kirby told her that he was hungry (initially thought to be sick) after pushing a boulder at Bobby Bear.
- He is one of the few characters not to be produced as a Maple Friend Figure due to his minor role.