Wally the Walleye, perhaps?
Nope, no walleye in Walled Lake. That lake is known for BIG redears, perch, pike and snapping turtles.
Wally is a half breed, a "mule", a cross between a snapping turtle and a now extinct species of duck billed platypus, the was found only in Walled Lake, before it had walls when it was only known as "Lake".
That platypus became extinct when the Wyandotte Indians move there from Southgate, MI to set up an early training camp for the Red Wings on "Lake".
Lake was very marshy then and hard to travel on. They looked for something to make push poles with and came up with the idea of using a "duck bill" shape on the end of a pole.
Since duck's bills were too small they tried using the bills from the female duck billed platypus that lived in "Lake". They used only female bills since they were twice the size of the males.
That left fewer and fewer females for the males to breed with, so they turned to snapping turtles, which is how the half breed "Wally" came about.
Young turtles at the time were known to whip perch, and other smaller fish, and were known as "Young whipping snappers"
"Lake" became "Walled Lake" after a series of disputes with it's neighboring lakes on how to handle the problem of the "Young whipping snappers" and built walls to keep his neighbors out, becoming known as "Walled Lake" as it is still known today.
NOW you know the REAL story of Walled Lake, and Wally of Walled Lake.
I am surprised you did not know this, being a Michigan resident and all.
For those who don't know what a duck billed push pole looks like I have attached a picture. So NOW you know how they came about and what they look like.