Simple 1500 Series Vol. 21: The Yakyuu Releases
| Name | DELETE THIS!! I MADE A DUPLICATE BY ACCIDENT!! |
| Region | Japan |
| Date | Oct 5, 2000 |
| Platform | PlayStation |
| Developer | E's |
| Publisher | D3 Publisher Inc. |
| Name | Simple 1500 Series Vol. 21: The Yakyuu |
| Region | Japan |
| Date | Oct 5, 2000 |
| Platform | PlayStation |
| Developer | E's |
| Publisher | D3 Publisher Inc. |
| Name | Simple 1500 Series Vol. 21: The Yakyuu (Pro Yakyuu Jutsumei Ban) |
| Region | Japan |
| Date | Jun 7, 2001 |
| Platform | PlayStation |
| Developer | E's |
| Publisher | D3 Publisher Inc. |