Enix never made games in house, even DQ is always outsourced. The only person from Enix that works on them everytime is Yuji Horii. Akira Toriyama and Koichi Sugiyama always work on DQ as well but they are not part of Enix. Chunsoft, Heartbeat, and Level 5 made the DQ games. TOSE made the spin-offs and did the GBC ports. I can't remember who did the other ports, but either way Enix didn't do anything internally. Enix always was a publisher, not a developer.