He can redesign the logo. He can use a... horse, for example.
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
The issue is about the word trademark "grumpy cat". The image can be copyright infringement although I have not seen any document about copyright infringement for the image used.
If there exists a copyright holder of the image used for this coin the person have to show some proof before reclaiming copyright infringement including EXIF information from original photo
and show that the same cat is used in this cartoon style image. If the artist who transformed the photo to a cartoon style image reclaims copyright infringment proof also has to be presented that I see pretty difficult.
Dev, if you get in to any problem let us know.
So there is no problem.