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Original Description:
 
The Polish dubbing credits for the Make Your Mark special accidentally credited Anna Cieślak (who recorded some of Sunny Starscout’s lines for this special and all her lines in the Maretime Bay Day episode of Tell Your Tale) as Sunset Shimmer. It is possible that, in the case of the special, Sunny and Sunset’s names were mixed up because of a poorly translated script and the dubbing director called Anna to record those lines (Anna voiced Sunset Shimmer from Legend of Everfree onwards, due to the old VA being fired for saying too much).
 
P.s.: The misspelling tag is here because Windy’s voice actress’ surname was misspelled (it is Saporznikow, not Sapoznikov).