>>54688785Brown + short hair + not a loli + late game character + no character interactions + from an older game
Japan doesn't like the first three and the latter three means most artists will be unaware of them, especially if they don't play Pokemon or are so bad at it that they quit before beating the game.
Acerola on the other hand is the complete opposite and prominently shows up in the anime too. Probably appeared in the SM promotional material too