That can be made by choosing tiger as the base and enlarging the head, adding muscle mass, meaty paws, and changing all colors to match him (have no idea of the color code but googling What are the hex color codes for Diego from Ice Age will suffice) if needed, use one of the options to either enlarge the fangs or give them more mass if it does not seem just right. Apart from that you can add your own decals that are available to make it your own. I will edit this later to post an image of the finished item.
-----Edit-----
I just uploaded the image for the character, it is the best I can personally do for the character you may be looking for, however it can probably use some minor details or adjustments to make it more like Diego from Ice Age. Also to note, I had to go off an Image from google as there were no Hex Colors available to really make it detailed.
Ideas
You mean a Sabertooth cat...
That can be made by choosing tiger as the base and enlarging the head, adding muscle mass, meaty paws, and changing all colors to match him (have no idea of the color code but googling What are the hex color codes for Diego from Ice Age will suffice) if needed, use one of the options to either enlarge the fangs or give them more mass if it does not seem just right. Apart from that you can add your own decals that are available to make it your own. I will edit this later to post an image of the finished item.
-----Edit-----
I just uploaded the image for the character, it is the best I can personally do for the character you may be looking for, however it can probably use some minor details or adjustments to make it more like Diego from Ice Age. Also to note, I had to go off an Image from google as there were no Hex Colors available to really make it detailed.