He's never mentioned by anyone, so it's presumable that he was killed by Dragon, as was any other knights sent by Farquuad.
When Pinocchio turns Gepetto disguised as Shrek to Rumpelstiltskin, he obviously doesn't fall for it.Which makes sense given that the mayor of Hammlin stiffed him and suffered the consequences.
Rumpelstiltskin pays the Pied Piper in advance.