Developed by Toka and published by Funsoft, this PS1 game had a strange anti-piracy measure of obscure inputs only written in the manual, in order to prevent piracy and push people towards buying a legitimate copy.
Since i found no suitable guide on Youtube, i thought i'd make a quick-and-dirty video for the basic controls which i found on Strategy Wiki
As it turns out, this is apparently a remake of the 1994 game Legend for the SNES, which has it's own Wikipedia page. Sadly, the PS1 Legend is relegated to a single sentence on the article.