This is a patch for alpha-version, that exist in GoodGen 3.21.
Patch is in XDELTA format, patcher can be dowloaded here:
http://www.romhacking.net/utilities/704/

Rom to patch:
ROM name: Rock n' Roll Racing - v15_alpha_r7 (Hack).bin
MD5: 8F0C169B27355AB1F43ECF5CE921C10C
SHA1: 56A1DF4B161CABC904B8B33E0AA6562E05605E6D

After patching: (rename to Rock_n'_Roll_Racing_Hack_v16.bin)
MD5: AAB66B246FA0E3392D95397DDC07FC4D
SHA1: 55F017D62BF7B3EC21950898DD1FE50B8F3A19F9


Version: 31 Dec 2019 version 16.0