In the books, Seymour is the best friend of Splat the Cat. Unlike the typical cat-and-mouse dynamic, they are inseparable allies.

Merchandise like the "Splat and Seymour Mouse" plush (based on the Splat the Cat book series) bridges literature and physical play. 🎮 High-Energy "Splat" Entertainment

While there is no single entity known as "Splat Mouse EX," the phrase intersects several major entertainment and media properties. Most notably, it combines characters from the film Strange World , the popular Splat the Cat children's book series, and digital marketing services. The Origin of "Splat" in Media