Normally, once this Evolutionary Energy enters an organism, it subtly alters the creature's genes, advancing its evolution.
This type of evolution is different from long-term natural evolution, where natural selection changes and filters the genetic traits of a population.
However, this evolution hasn't been validated over the long term by nature; in other words, it's an uncontrolled evolution.
If the individual doesn't absorb much energy, then it might indeed follow the rules of natural evolution,
just like that Megalodon,
absorbing special evolutionary energy while surviving in nature for over a million years,
where any danger encountered in the wild would prompt it to evolve in the correct direction.
Besides,
