Pacifica admits that she believes there is good in him, and is determined to help him find the light. Dipper has been shown to have, at the very least, amusement for her positive determination, and kindness for him; once calling her 'quite cute'. However, whether he truly begins to develop feelings for her is yet to be confirmed.
It's shown in many fanfics that he slightly cares about her and hates when someon hurt her.
Reverse Dipcifica is made by the fans of Reverse Falls, coming from the first shipping of Dipifica, Dipper Pines and Pacifica Northwest from Gravity Falls.