Pokemon designers (before Gen 2 dropped) watched early Dragon Ball (Pilaf to Cell) and found it cool design wise, same for many other shonen, kodomo, and shojo shows and a bit of seinen.
Toriyama just wanted to draw scat jokes and be done.

That's why he immediately fell off after GT ended and DQ6 came out with people like Nakatsuru trying to honor his peak eras since the dark ages.
>Toriyama's dying last breath on the left