here are the credits from Zook:
Spoiler: click to toggle
CASE LEADER
Manager
DESIGN
Shin
PROGRAM
Linda
ART
David
MUSIC
Hanman
TEST
Nereid
Sonic
Moby
THANKS
Jackie
Jannet
George
Ruman
Black
Akira
Kiwi
Momo
All first names/pseudonyms only, but some of the names are familiar from their other later games.
oh and there's no "to be continue" like in Zook Hero 2 or their Digimon games, it just says "THANK YOU FOR PLAYING... AND SEE YOU AGAIN..." so maybe they knew this would be the last Zook game..
also I think some of you already know about the unused 2003 Vast Fame copyright present in Zook's graphics (it was in the portion of the ROM dumped a long time ago), but Juezhi Sanguo has a big VF logo in there which also seems to be completely unused (unless it's displayed at the ending)