When Sweetie visited Rarity’s shop in Manehattan for the first time, since she wasn’t capable of doing it ever since it had opened years ago, she met Rarity’s eccentric, happy and exitable assistant: Plaid Stripes.  
They both connected real fast over their love for collecting weird things, singing out loud, their love for fashion even though they aren’t good contribuitors, and overall bouncy lousy personality, and became best friends real quick.
 
They both start to feel attracted to each other very soon, specially Plaid.
 
Their relationship is great
 
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Sosososossososo
 
I don’t seem to find any good Sweetie Belle pairings (Button and Rumbe are taken…….. By each other) then I made one myself.  
I love cheerful people together, and combining these two would be a blast  
Plaid is probably the only pony to ever eat Sweetie’s toasts, since she has the best spoons for them.  
Sweetie always follows her “fashion trends” and ideas and wear anything she brings home.
 
I dub this ship Marshamllow Stripes
 
(tryna upload things on my own in here…. I suck at descs dang)