Wtf errr my brain is in agony cause errr explanation
Similar art styles does not mean that they are the same. The Link from Four Swords Adventures looks like the Link from The Wind Waker. But they are not the same. Toon Link is just a name for the Link in Brawl that looks like the Link from The Wind Waker. The name is only a joke on the cel-shaded art style. It doesn't mean anything. Not only that, but Brawl is not canon. So any supposed connection is not logical.