The Spike Bulldog is a fictional character from the animated television series Tom and Jerry. He is a large, muscular dog known for his protective nature, especially towards his son, Tyke. Spike often finds himself in humorous situations as he tries to keep peace between the mischievous Tom and the clever Jerry. Spike is characterized by his tough exterior and deep voice, but he also shows a softer side, particularly when it comes to his family. His interactions with Tom often lead to comedic conflicts, making him a memorable character in the series.