Well sorry if I change since I had a hard time thinking of the pet and powers since my opinion is that it was too common and I decide to change.

Pet:

Name: Caramel Puppy
Info: It will help their combi cookie to destroy the obstacles by summoning the hot melted caramel and splattered on the obstacle to earn more points.

Powers:

The background changes into a forest that is midnight.

She was wearing a cloak that she's holding a daggers while runs very fast that can attract the jellies and coins and also can destroyed the hunters who tried to apprehend her who is their next victim.

(presumably she's a fighter in disguise).