Not sure why Yoshi would allow anyone to ride their backs. Wario eats them, sure, but Mario dumps them into any bottomless pit he leaps across. I'd have more respect for the guy who appreciates a meal over the one who just wants to go a little higher. I also respect Yoshi's choice to glare at Waluigi because we all know trying to stare down Wario would have just made him aggressive and then no one is going to have a happy Easter this November.