On title screen you can choose "Continue" and input 32 symbols password (A button - input, B button - previous symbol, Select - next symbol) and play any match in game with different team players ...

Select CONTINUE on the menu screen, use the d-pad to enter the proper characters, then press start. Player should be taken to corresponding match against corresponding team.

see src/nesgym/nekketsu_soccer_env.py. This website gives RAM mapping for the most well-known NES games, this is very useful to extract easily the score or lives directly from the NES RAM memory, to ...