Thanks. I was later able to acquire the credits YT ID: watch?v=gOvjD6RDA1o
However, at a first glance (note: I didn't analyse them at all just was able to see an Imagineer staff heading: that listed producers, directors, programmers, graphic artists (ofc: Sanrio own the character rights)). It seems like Imagineer were the main developing staff; who I've seen a lot have worked on many Sanrio related games like Sanrio Timenet (and others that may have been at least published by Imagineer).
I notice from time Hello Kitty World is brought up, although with Mario Co. Ltd attribution instead. I've read that they are related to Nintendo & Dentsu. Maybe even Nintendo & Dentsu Game Seminar. May you share anything more about them and their relevance to its development please?
This game is also a Yoshi's Cookie clone, but a friend brought up the origins of Yoshi's Cookie go back to Bullet-Proof Software and Hermetica. This could explain the Nintendo copyright notice too.