@Background Pony #083C
Yeah, because Walfllower only steal the memories from the whole CHS school. She can’t erase memories from the Dazzlings or anyone else outside of CHS. I guess this would explain in a YouTube video by James A. Williams titled: “Honest Trailers (Parody) - MLP Forgotten Friendship”, where James A Williams tells Adagio Dazzle if she remember how she and her sisters Aria Blaze and Sonata Dusk were defeated by the Rainbooms during the Battle of the Bands the Dazzlings have created, knowing who Sunset Shimmer is, remembering by what Sunset Shimmer was doing during the battle, or if they hear anything about Midnight Sparkle and Juniper Montage or anything that whatever can’t happen.

@Background Pony #083C  
Wallflower would never erased everyone’s else’s memories of the Dazzlings. Because these three harmless teenage girls/sirens are downright evil! I know that in the climax of Rainbow Rocks, the crowds of CHS and the rest of Canterlot City discovered that they’re trying to takeover the human world and win the CHS Musical Showcase/Battle of the Bands but they failed.

@Background Pony #083C  
What? No! The whole things that when she discovered the Memory Stone, she erased the good memories of Sunset Shimmer from every CHS student’s minds. I think she’s trying to make history repeat itself. She didn’t erased the memories out of the other human beings of the Human World. She never erased the Dazzlings’ memories. Because they’re not truly CHS students.

@Background Pony #02B7  
The word “Fantastic” should be accompanied by sarcastic air quotes,

@Background Pony #3A1E  
No, just theirs

I like it!

Wait, that doesn’t make sense.
 
Shouldn’t she erase everyone else’s memories of the Dazzlings??

That looks fantastic

GOODDDDD……….

For this reason they did not reappear