Mr.Slushy Burger or (Mr.Slushy Dawg) is a frequently occurring restaurant chain in Phineas and Ferb. Jeremy is shown as working there. Candace also tried to get a part time job in Unfair Science fair.
Now, I was curious if this is a reference to ant famous restaurant. In Bully Code, the motto of the restaurant is shown.
Baljeet: Do you find it as curious as I do that your menu has not changed since you opened in 1929?
Jeremy: I know! It's awesome, right? It's our motto.
Slushy Dawgs Will Never Get Any Better.
It's better here
It's way better than fast food... It's Wendy's
Is Mr. Slushy Burger related to any restaurant chain or in particular Wendy's? Any interview or some other source which says this or against this?