from left to right:

Fondue (Pinkie Pie + Cheese Sandwich) is a reserved stallion who cooks for a high-end restaurant in Canterlot.

Cheesecake (Pinkie Pie + Cheese Sandwich) is an energetic teen filly who dreams of opening a branch of Sugarcube Corner in Manehattan.

Key Lime (Limestone Pie + Graham Crust) is a renowned tennis player who enjoys the elite lifestyle.

Marble Soda (Marble Pie + Fizzy Frizz) is a humble soda jerk in Ponyville who loves whipping up fun drinks for her customers.

didn’t come up with a kid for Maud and Mud Briar; they don’t seem like the parent type!