Toriyama was responsible for the monster designs and character designs in the original DQ games. In that way, his influence can be seen in all of the monsters that exist in the dragon quest series, this one included. However, Toriyama did not contribute towards the story or character designs of the Dai no Daibouken series.
That being said, this series would likely not have existed if not for his influence and contributions to the franchise as a whole. RIP Toriyama.