Deborah Walley, who voices Lahwinie, had the titular role in Gidget Goes Hawaiian (1961). This episode (Gadget Goes Hawaiian) is a spoof of that film title.
This is the second consecutive episode (after Double 'O Chipmunk) to feature a Gadget look-a-like. In the previous episode, the look-a-like is revealed to be Gadget in disguise. In this episode, Lahwinie is just a different person (well, mouse) who happens to be a nearly identical twin in appearance to Gadget.
Monterey Jack's quote from this episode ("it's raining marshmallows!") inspired the title of a children's song book published decades later.
A cultural sensitivity warning precedes this episode on Disney +.
Final series appearance of voice actor Rob Paulsen.