Spike the Bulldog is a fictional character from the animated series Tom and Jerry. He is a large, muscular bulldog known for his tough demeanor and protective nature, especially towards his son, Tyke. Spike often finds himself in humorous situations as he tries to keep Tom the cat away from Jerry the mouse. Spike is characterized by his deep voice and strong loyalty to his family. Despite his fierce appearance, he has a soft spot for Tyke and occasionally shows a gentler side. His interactions with Tom often lead to comedic conflicts, making him a memorable character in the series.