Not to mention it's homage to his saying in Starfox Assault: "I already told you, I didn't come here to save you." (mentions it to Fox after saving his life from the Aparoids). He came to Fox's rescue simply because if anyone were to defeat Fox, it'd be him. "He'd be the one to take Fox down". Get it? In that sense, SSBB gets a gold star for past game references.
However, what's with people thinking he sounds western? I don't hear that at all...where's the Cowboy twang? He doesn't say "Ah'll bee thuh wuun ta take yew downn!" He just says it with a deep voice. The only line that sounds even remotely western is his "Playtime's over, Starfox!" line. And even THAT doesn't have a big twang. How does Wolf's voice translate to western, Cowboy, or any of the stereotypes people gave him?
While I don't LOVE the voice they gave Wolf (again, would have preferred the Starfox Assault voice), this one's alright...and does NOT sound western.