Yoshihiro Nagamori... I've said this a few times in some other threads but largely because I was a huge fan of toys anime back then so his artworks just stuck to my mind a lot, but even until now I still admire his character designs and works. For reference (and in case you don't feel like clicking the link), he did the main character design for almost every Beyblade, Bakugan and B-Daman series with few shoujo-styled works like Kirarin Revolution. These DVD covers are basically my fav work from him.
Though emphasis on the "almost", the anime that kicked me off to go with this style is actually an series titled "Crash B-Daman" which is...the only series from this franchise where Yoshihiro Nagamori ISN'T involved with ironically, lol. I wish I could list the main chara designer as an inspiration but this series is pretty much his only work from this kind of genre, although he's involved with recent works from Ufotable like Touken Ranbu/Katsugeki and F/SN: UBW.
That said, this style was stuck to me since childhood and as much as how kiddy and outdated it is, I just...hold a strong attachment to it and couldn't find any new styles I could click with, ahahah. I'm a fan of 2000's anime artstyle in general, and the category for this artstyle is one of the most underappreciated ones :'D
I will say that I no longer tried to be the "fake official art" kind of artist towards my art and this style for reasons, but clearly the influence is still there and I did ended up emulating my own style that still fits within this genre...