Uhhhhhhh...yeeeeeah? Princess Celestia let him out and asked Fluttershy to turn him good, so she made friends with him even though he was TOTALLY rude to everypony the whole time and almost flooded Applejack's whole farm, so I guess now he likes her so he's being nice so she'll stay friends with him.

Oh, but Twilight has the Elements now just in case we ever need to turn him to stone again. They're in the library too!