Could easily be Yorkie Chihuahua, even though google images doesn't neccesarily match.
Could be Yorkie JRT. My Silky Terrier (very similar to Yorkie looks-wise) had a litter of puppies with a JRT when I was a kid, and one of them looked IDENTICAL to Plinko. Same coloration (but with some white), face shape, coat type, ears, etc.
Yorkie JRT from google:
The dachshund/yorkie looks pretty dang close, though!