hmmmm......im havin a go..but well, we will see........

D udley, well it has to be said, is a little (or even large) pig, cos...
U ncle Vernon and Petunia spoil him with things he doesnt need.
R otten parents don't you think, as a
S econd young lad lay forgotten...
L ook under the stairs and there in a cupboard you will find an
E ager young magician who works secretly, indeed,
Y et it is Harry who is famous in his world
S o the moral of this holdhold - unpleasantness never succeeds.

OK so the the rhymes dont really fit - but at least I had a go........