Here are the Top 10 results:
1st - Firelight and Rainbow Dash (collected 45 gems)
2nd - Cheese Sandwich and Rarity (collected 43 gems)
3rd - Fluttershy and Dr. Hooves (collected 41 gems)
4th - Goldengrape and Lyra Heartstrings (collected 39 gems)
5th - Braeburn and Amethyst Star (collected 37 gems)
6th - Twilight Velvet and Windy Whistles (collected 35 gems)
7th - Bow Hothoof and Cotton Sky (collected 33 gems)
8th - Vapor Trail and Huckleberry (collected 31 gems)
9th - Loganberry and November Rain (collected 29 gems)
10th - Citrine Spark and Summer Breeze (collected 27 gems)
Out of all the ponies, Firelight and Rainbow Dash collected the most number of gems, with 43, while Citrine Spark and Summer Breeze collected the least number of gems, with 27.