I don't recall if Yoshi's new voice was even in the GBA remake, but I can't remember it bothering me. Then again, I never hated it to begin with. The only annoying sound effect I recall from the game is Baby Mario's crying, and if you're good, you won't have to hear that very often.

And, yeah, 3PX, SMW2 is definitely a big departure, but I think the game is more than worth it for the boss battles alone. Though if that's still not enough assurance, Mario and Luigi: Superstar Saga is also awesome. Great SM-RPG-style gameplay combined with a hilarious story and characters. Fawful should be in SSB Brawl. I hope he's at least an Assist Trophy.

The best part: the seven elder Koopalings are all bosses and there's no Bowser Jr. in sight.