This page explains in detail the interactions between the Nintendogs series and the Zelda series.
Nintendogs + Cats[]
February 26, 2011
Nintendogs
Zelda
Nintendogs+Cats features AR Cards compatibility, and when using Link's card the dog appears wearing Link's hat, complete with part of his hair based on his "toon" incarnation.
License[]
Copyrights for both series are held by Nintendo.