Brilamp to Electrap

Brilamp: They float in the darkness of abandoned castles. Since they have no where else to go, they are used to being bored and often accompany trainers for the sake of adventure.

Chanderlight: When a group of Brilamps come together, they evolve into Chanderlight. They are less likely to follow trainers now because their seperate minds are still active and they socialise with one another within this new body.

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Rejemoth: A poison/electric Pokémon specialized in fighting bug Pokémon. From its body emits a colorful haze that bugs cannot take, and weakens them. Rejemoth then uses other attacks to finish them off.

Electrap: Their bodies have turned to plasma that prevents other living things from touching them without being shocked. Not only do they eliminate bugs, but the light from their plasma structure nourishes the plants they devour.