If you're struggling to defeat a Flying Battle Pet, these Battle Pets have a double advantage as they both take less damage, and do more damage.
These are Battle Pets which deal 50% increased damage against Flying pets, and take 33% less damage from Flying attacks.
Azure Whelpling
Emerald Whelpling
Sprite Darter Hatchling
Netherwhelp
Spirit of Competition
Essence of Competition
Celestial Dragon
Lil' Tarecgosa
Sun Darter Hatchling
Nether Faerie Dragon
Chrominius
Infinite Whelpling
Nexus Whelpling
Emerald Proto-Whelp
Yu'la, Broodling of Yu'lon
Lanticore Spawnling
Bronze Whelpling
Emmigosa
Stormborne Whelpling
Dream Whelpling
Nightmare Whelpling
Ironbound Proto-Whelp
Infinite Hatchling
Bronze Proto-Whelp
Ageless Bronze Drake
Discarded Experiment
Twilight Clutch-Sister
Scaley
Azure Windseeker
Lil' Nefarian
Twilight Whelpling
Anima Wyrmling
Moon-Touched Netherwhelp
Blinky
Jeweled Onyx Whelpling
Jeweled Sapphire Whelpling
Jeweled Amber Whelpling
Jeweled Emerald Whelpling
Magic Nibbler
Stormie
Rithro
Nelthara
Senega
Axel
Kromos
Obsidian Warwhelp
Kal'andu
Astral Emperor's Serpentling