Here are the answers!

BEN TORR = NORBERT

ASK SOCK HORN = CROOKSHANKS

A BALD MUONG = LUDO BAGMAN

CLEVER ICE YON = COLIN CREEVEY

GERMAN ROGER HE IN = HERMIONE GRANGER

HA REPORT TRY = HARRY POTTER

MAR YAM FED MOP = MADAM POMFREY

DO REV MOLT = VOLDEMORT

A MADSTONE = DEAN THOMAS

AMUSE FANG IN SIN = SEAMUS FINNIGAN

EARTH PRO TRY = HARRY POTTER

EAGER GERM HORN IN = HERMIONE GRANGER

A BLOB LED DRUM SUE = ALBUS DUMBLEDORE

DEAD YE MOM YO = MAD-EYE MOODY

MERLIN UP US = REMUS LUPIN

BE GLEE FIT FOR HOT = GOBLET OF FIRE

CUBA SILK SIR = SIRIUS BLACK

YUL RAT WAS HERE = ARTHUR WEASLEY

 

Here are the answers to the sentences:

TERRA TROPHY SI CAST FAINT ! = Harry Potter is fantastic!

HAM I IS BANG SET FIG ! = I am his biggest fan!

 

Credits for the anagrams go to Ashley, Becky, David, Fábio, Marissa, Michelle, Sam, Sarah, Tara