Krakaloa

Bulky Attacker (Set 1)

Set
Moves: Fire Breath, Burn Up, Rejuvenate, Magma Block

Item: Health Amulet/Fire Essence

Ability: Combustible

Personality: Smart, Clever/Robust, Very Frail

TPs: 200 Ranged Attack, 200 Ranged or Melee Defense, 100 HP

Reasons
Fire Breath is a decent STAB move, and is preferred over Magma Burst because of Krakaloa's high energy stat. Burn Up can set up a little bit, and Rejuvenate heals, pairing up with the nice bulk of Krakaloa. Magma Block is obviously good for melee attackers, because of the free damage if they attack.

Combustible is the only viable ability, but you could use Territorial if you really can't get an SA.

Health Amulet boosts the good bulk, but Fire Essence is used if you already have another Loomian with Health Amulet.