| 2025-10-04 08:21:00 | ps1ch | Added tag 'screenshots-needed' |
| 2025-10-04 08:19:54 | ps1ch | Added tag 'trainer' |
| 2025-10-04 08:19:50 | ps1ch | Set title to 'River City: Rival Showdown (USA) +9', release date to 1 December 2017 |
| 2025-10-04 08:18:34 | ps1ch | Added info file |
| 2025-10-04 08:17:45 | ps1ch | Edited notes |
| 2025-10-04 08:17:23 | ps1ch | Added link https://dats.site/_rls_3ds_infolist.php?showmaster=rls_3ds&fk_game_id=2531 |
| 2025-10-04 08:16:35 | ps1ch | Edited soundtrack details for River City Rival Showdown USA Plus9 Trainer |
| 2025-10-04 08:13:12 | ps1ch | Added credit for Mem O' Ree on River City Rival Showdown USA Plus9 Trainer: Music |
| 2025-10-04 08:12:41 | ps1ch | Added credit for Poyz on River City Rival Showdown USA Plus9 Trainer: Graphics (ascii logo) |
| 2025-10-04 08:12:22 | ps1ch | Added credit for Crossfade on River City Rival Showdown USA Plus9 Trainer: Graphics (logo) |
| 2025-10-04 08:12:09 | ps1ch | Added credit for Riley on River City Rival Showdown USA Plus9 Trainer: Code |
| 2023-04-15 06:14:30 | menace | Added production 'River City Rival Showdown USA Plus9 Trainer' |