If you're struggling to defeat a Elemental 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 Elemental pets, and take 33% less damage from Elemental attacks.
Scooter the Snail
Shimmershell Snail
Rusty Snail
Silkbead Snail
Rapana Whelk
Mudshell Conch
Glutted Bleeder
Bloodfeaster Larva
Spireshell Snail
Blackchasm Crawler
Trench Slug
Muck Slug
Amethyst Softshell
Prismatic Softshell
Hungry Burrower
Grubby
Corpselouse Larva
Feasting Larva
Tower Deathroach
Hissing Deathroach
Undying Deathroach
Decay Grub
Vile Deathroach
Metallic Scarabid
Predatory Helicid
Shelly
Archetype of Vigilance
Microlicid
Cobbleshell
Thimblerig
Tricky
Roseshell
Brulee
Newsy