Sanrio Cup - Pon Pon Volley is a volleyball-themed sports game featuring characters from the Sanrio universe on the NES. It's likely a simple, arcade-style game focused on fun and easy-to-understand gameplay.  Specifics of developers and detailed gameplay mechanics remain difficult to verify through English sources.  It underscores Sanrio's involvement in various genres during the NES era and its ability to adapt popular gameplay mechanics.

Sanrio Cup - Pon Pon Volley (Japan)

Sanrio Carnival (Japan)