I just re-watched this episode and surprised I didn't notice before, but when Fluttershy turns up after Spike had been trying to cheer Garble up, Spike tells Fluttershy that Smoulder's brother is 'Garble' and Fluttershy reacts to the name.
That got me to thinking... has Fluttershy even met Garble before?
Would Twilight, Rarity and Rainbow Dash describe to Fluttershy the mean dragons by name?
I don't see it happening. Literally unwatchable. Zero stars.