There are different ways through which you can do this crafting of 2D into 3D like of scalling, shearing. https://errorcode0x.com/fixed-dell-printer-error-016-302/ helped me to get the best way to do this.
The reason this hashtag started was that there was a guy in Japan criticized the company behind pokemon(gamefreak) saying that their 3D artist are useless. and skilled 3D models would be able to be made in 5 minutes. He mentioned that you can do 800 pokemon each in 5minutes so close to 60 hours will be only needed. and if they can't do that, they are not worth the salary. and 3D modelers took this as a challenge. Resulting in 3D modelers doing modeling / sculpting in various 3D software.
Don't know if you're still having this issue but it's fixed by enabling "Specify Manual Texture Size" and then playing with the "Manual texture size" input until it seems right.
Yanal Sosak has recently shared a nice tutorial for beginners on sculpting in Blender. The thing is that Zbrush and Mudbox users, for example, can find something useful too, so check out the video.
A beginner introduction tutorial for sculpting in Blender. Zbrush user, Mudbox, or any other sculpting software, you will still be able to follow this video.
The full guide with model, materials, lighting and more can be found on Gumroad.