Brother Pierre is a character from The Busy World of Richard Scarry episode The Royal Game of Dennis
He is a cat and he is a monk in a French monastery in the 15th century.
He dose chores with Brother Dennis but (like Dennis) he would rather play rather than work.
He invented the game of tennis with Brother Dennis using carpet beaters and some socks.
In The Busy World of Richard Scarry, he is voiced by Peter Wildman.