Nothing special... just pixel art.
I give credit to www.etsy.com I found the image on Google Images. You can find it in this link, https://www.google.com/search?q=cute+tmnt+pixel+art&rlz=1C1VFKB_enUS603US603&espv=2&biw=1366&bih=643&site=webhp&tbm=isch&imgil=XhJfrWTp8nWWIM%253A%253BaRYhOV0j7dz50M%253Bhttps%25253A%25252F%25252Fwww.flickr.com%25252Fphotos%25252Fbobbeyjazz%25252F6030646866%25252F&source=iu&pf=m&fir=XhJfrWTp8nWWIM%253A%252CaRYhOV0j7dz50M%252C_&usg=__7RdEONYPaMlCxvc9ImdcOpDY8L8%3D&ved=0CCcQyjc&ei=itTwVN1JibOCBImxgagL#imgdii=XhJfrWTp8nWWIM%3A%3Br8TR0lZ9IzAKWM%3BXhJfrWTp8nWWIM%3A&imgrc=XhJfrWTp8nWWIM%253A%3BaRYhOV0j7dz50M%3Bhttps%253A%252F%252Fc1.staticflickr.com%252F7%252F6121%252F6030646866_e8f54a9cc5_z.jpg%3Bhttps%253A%252F%252Fwww.flickr.com%252Fphotos%252Fbobbeyjazz%252F6030646866%252F%3B640%3B480
