Corrected entry: Pumba supposedly became an outcast because he smelled so bad, and he apparently still does because Timon often makes references to it. But neither Simba, Nala, nor any of the other animals meeting him for the first time react to his smell in any way. Of course they wouldn't make a big deal out of it if they're trying to be polite, but you'd think if he smelled that bad they'd have some reaction.
Garlonuss
16th Feb 2004
Correction: It's not exactly his regular smell that made him an outcast. It's his flatulence problem. It may very well be that, during those scenes that we are shown, Pumbaa is simply not tooting.
Garlonuss ★