https://tcrf.net/Tintin_in_Tibet_(Game_Boy_Color)
Looked more into the partial zip data.
Seems like GB/CINEM/01.GRF has 897 bytes out of 1.23 KB.
The data itself contains source data for Tintin in Tibet. GB/FACES/JETAS.GRR matches the raw data in the rom minus some of the header.
The compression header starts with 0z5A597900. Same for Ronaldo V.Football.
Several other games developed by Bit Managers uses RNC compression, which I have tools for(except the Game Gear format).
https://tcrf.net/Category:Games_developed_by_Bit_Managers
The format for Tintin in Tibet and Ronaldo V.Football GBC I haven't found de.compression tools for yet. =@.@=