Ganbare Pennant Race! is a Japanese NES game, likely a baseball simulation or management title. The specifics regarding the gameplay mechanics, development team, and publisher are currently unknown without further research into Japanese gaming history and databases.  Given the title, it was probably a baseball-themed sports game, common on the NES. The information requires more investigation into Japanese game archives.

Ganbare Pennant Race! (Japan)

Ganbare Goemon Gaiden 2 - Tenka no Zaihou (Japan)