Kalpin's Adventure
Ryoma accidentally packs his cat's [Karupin's] favorite toy in his tennis bag, so Karupin follows him to school and explores the grounds. When Ryoma finds out his cat is on campus, he rushes to find him, worried about what may become of him. After finding out that Ryoma has been relentlessly searching for his cat, the other members help him in his search, eventually helping him find Karupin.
Aired 17/04/2002EP 27 - Kalpin's Adventure
The Prince of Tennis
Echizen Ryoma is a young tennis prodigy who has won 4 consecutive tennis championships but who constantly lies in the shadow of his father, a former pro tennis player. He joins the Seishun Gakuen junior highschool, one of the best tennis schools in Japan, and there along with his teamates he learns to find his own type of tennis in an attempt to defeat his biggest obstacle of all: his father as well as himself.
(Source: Anime News Network)