Morales wasn't that great, Manny KO'd the sh$t out of him twice after that. don't get me wrong, Morales was a avery good fighter but making it sound like prime Manny losing to him as if he was a better boxer than Manny, is not jiving.
Look Pacquiao was just coming off of his destruction of prime Barrera. The fact is Manny was primed and he lost to Morales. I'm a huge Pacquiao fan, but straight up he lost to him.
IMO it was the Mosley fight, he had to fight a different fighter who moved around more than he used to
He didn't decline, he was just exposed as someone who struggles with movers and made a career out of beating flat footed fighters.