Originally, Blista was just an ordinary bat in the Gorge of Eternal Depth until Chi dropped by Laval caused him to evolve along with other bats and the scorpions and spiders, and they gained an intense hunger for more Chi. They captured Crominus and Crunket and took them to the surface where they were showed the source of Chi, Mount Cavora.
The Black Cloud Edit
They then blocked up the falls using the Bats' ability to turn into a black cloud so they could steal all the Chi, but were interrupted by the Tribes of Chima.
The Bats attacked the eight Chima heroes as they entered the Outlands and chased them into Lavertus' Speedorz gauntlet, where they were beaten. They were beat when Rogon used his Rock and Rolling Rogon Roller to knock rocks down on them.
They later took the spiders and returned to Mount Cavora, but Blista and his Bat Striker were shot down by Eris in her Eagle Interceptor, and Blista lost the Chi.
Blista was carrying a bunch of Chi orbs with other bats when they were hit by Rogon on his bike, so they tried to attack him, but were knocked out by the sound of his rock rubbing on his bike.
He later chased the eight Chima heroes and the Legend Beasts, but were buried by Laval's Chi-powered stick grenades.
Laval and Skinnet went to Lavertus' Outland Base looking for his "unfinished business" and discovered that Blista, Braptor and three other bats had escaped the Scorpion Cave and had left their weapons in the base. Laval and Sir Kicksalot defeated the other three, then Laval kicked Blista into a wall. He then roared and scared Braptor off, with the others following. They are most likely still in the Outlands.
Somehow, he was later held in Sir Fangar's ice trophy collection with other bats that had not escaped the cave and been frozen with the scorpions and spiders.
After the Great Illumination, Blista and the Crawlers were turned nice and became friends with the cured Hunters and Chima tribes, celebrating Christmas with them.