Oxnard is a food-loving hamster, he is usually seen eating, and, like most of the hamsters, he is easily tempted by sunflower seeds. He is Hamtaro's first and best friend, and it is also a coincidence that their owners are best friends at school. Oxnard is a rather clumsy hamster but can also be a caring friend to Hamtaro. Although he goes on many adventures like the rest of the Ham-Hams, he doesn't seem to be as active as they are, having to visibly run slower than the others. He is usually seen with a sunflower seed in case he gets hungry. Oxnard is very loyal, and, despite being a coward, he can be very brave.
Oxnard was the first hamster Hamtaro met after moving into their new house, and the two have been best friends since. They were neighbours until Oxnard went to be with Pepper. Even their owners are best friends.
Oxnard and Pepper are official lovers. Oxnard first admitted his feelings in Oxnard's Big Crush. Oxnard loves her deeply, he loses weight for her, and later Oxnard stays at Dylan's farm with her. In the last episode, Happy Ham-Ham Wedding! Oxnard and Pepper return to the Ham-Hams to announce they are getting married, and do so at the end with every Ham-Ham they have met invited (excluding ones only seen in OVAs, movies, and games).
- Jingle, the Wanderer (#10)
- The Snoozer Mystery! (#20)
- Oxnard's Big Crush (#37)
- Welcome Pepper! (#42)
- Pepper's Visit! (#53)
- A Fortune Comes True! (#69)
- The Baby Goat (#70)
- Let's Dance, Ham-Hams! (#110)
- Oxnard Shows True Love (#119)
- Run, Pepper! (#179)
- Big Penelope (#220)
- Nice To See You, Pepper! (#242)
- Oxnard and Pepper (#285)
- Happy Ham-Ham Wedding! (#296)