DQ1 has only been remade 1 time

and that was SNES also DQ1/DQ2 are alway bundled now. these two games being sold SEPARATELY is a slap to the face.
if you mean ported well it's been ported a couple of times (gbc and cellphone are the only I can come up with) but not like FF1/FF2 (ps1, gba, wonderswan, cellphone and PSP)
also when a DQ game gets remade, is a remake in every sense of the word. stuff gets fixed/added and the game receives a graphical overhaul compared to the original version it's nothing like this.