This hack changes all players/teams completely, and some arenas as well. There are more changes, such as you can punch by pressing the B button, and in the last round you can't see the ball.
Video: https://www.youtube.com/watch?v=f66rSDFywXE
-update version 2.0
-all the speed bugs has been fixed
-added patch with all uniform available from the start and fixed 2 player mode with all teams
-added special patch [cpu] now you can play 2 player mode against the cpu with any team you want against team and players.
Patch the Japanese rom (Ike Ike! Nekketsu Hockey Bu)
Country: Japan
Internal checksum 8A60
CRC32 03ECD3E7
MD5-31EF0BB80B1410A310EE99850ACE8BBD
SHA1-66FFF97D285FDA1E0A51C372AF5322245FAAB3A2
SHA-256 10ECCC5D2FAB81346DD759F6BE478DCB682EEF981E8D3D662DA176E1F9A996BC