What is this? Part 10

Since no one is guessing any letters that could be in the text below the image, I'm just going to have to reveal it bit by bit.

What is this? Part 9

Guess more letters. This time I'd like to give someone else a chance to guess.

What is this? Part 8

Guess the letters. The comment with the most likes will be shown in a future post, if it's correct of course.

Happ birthday kool i hope you enjoy the stock cake

What is this? Part 4

WHO IS THIS (SHAKING

[ Character owned by my boss @KoolCirby ] LEAPS VIOLENT)

What is this? Part 3

Artoon seems like it was very underrated game development company even when very key people worked there.

Naoto Ohshima, the one who originally designed Sonic the Hedgehog and Dr. Eggman, founded (or at least co-founded) this company.

Happy Birthday Cirby! You're a Kool Fella

What is this? Part 5