Great game. Had potential to be a good franchise(Square's own LoZ-esque series), but the PS2 sequel killed it(oddly enough, that was around the time a lot of franchises were "killed" and Square was making way for priority focus on Final Fantasy and Kingdom Hearts). That and that was when Tetsuya Nomura was at his absolute worst(and was into his "heavy angled" characters).
Really sucks, as yeah, I wouldn't have mind if the series became a mainstay. the first one is pretty whimsical and light-hearted. Probably wouldn't do well now considering there's this sense of "everything's gotta be mature and realistic" bravado in the community(Western gamers, in particular). I would actually align it with Goemon and the Little Ninja Brothers(from the MIA developer Culture Brain), very whimsical, light-hearted and comedic adventures with Asian lore applied to fantasy-based worlds. Personally speaking, I want more games like these!! It speaks to the kid in my heart(and quite frankly, I don't get tired of them).
BTW, the kingdoms were called the Allucaneet Kingdom(the good guys, with characters all named after food) and the Thirstquencher Empire(with characters named after drinks). Kinda cute. My favorite part still has to be the Vambee part(with the vampire-zombies that go walking around the town at night, and that creepy music that plays throughout the chapter).