Create a base image. Use an image editing program to create an image based on Dragonball Z. You can also draw an image on paper and scan it in to your computer to be used in one of these programs. If you would prefer not to create an entirely new image, there are many pre-existing images from online fan sites that can be used.
Edit the image. Use the image editing software, or an online resource, if you wish to make changes to the image. Features such as text and borders can be added this way. You may also animate your avatar using digital image editing software or an online resource.
Resize the image. Use the resizing option in the program to size the image to the specified dimensions which your avatar must be (this size varies depending on which website your avatar will be used on), then save the image. There are online resources for resizing images to be used as avatars if you prefer not to resize the image manually.
Upload the avatar. Use the upload image feature for the website on which your avatar will be used. Browse to your avatar and select it to be uploaded.