Blue Light takes the form of a large whale shark with a bright blue color. It also has many white diamonds on it along with white diamonds for eyes.
(Ability titles presumed from gameplay, not official)
- Blue Shock: Blue Light shoots an electric ball at one gem. If the attack hits, the gem hit will be paralyzed, rendering them immobile for one turn.
- Bubble Blast: Blue Light fires bubbles at each of the gems. Each one has a random chance to be a fish.
- Fish Blast: While using Bubble Blast, Blue Light randomly fires fishes. If it is blocked, the fish lies on the floor, causing Blue Light to open its mouth and spend its next turn sucking it up.
This fight plays out like a generic battle until it uses Fish Blast. At which point, Blue Light will open its mouth and expose its gem. Here, the player can attack the gem for extra damage. At the end of the turn, Blue Light will suck up the fish and close its mouth. If Blue Light is defeated before the fish are reabsorbed, they remain on the floor after the fight.