This is Squirtle Girl by "Dangoheart", based on the Squirtle from the Pokemon franchise.

Check this video where the design of the skin came from: https://www.youtube.com/watch?v=MoKHX1Nwey8

Check the original channel "Dangoheart" here, all credit goes to him: https://www.youtube.com/@DangoheartAnimation

Disclaimer: I do not own this character, this is use for cosmetic purposes only. The property of Pokemon is owned by "Game Freak" and "Nintendo", support these companies by purchasing and download their games on any available streaming services.