Due to the fact that most of my characters' antics existed and happened in the mixedbag realm/universe thing, Rainbow Energon also existed, and had different abilities. (and it also serves as a McGuffin by Both Sides)
Rainbow Energon was thought to exist due to a Randomness Overload which happened after the realm was created. (probably due to an Explosion somehow, that would make it cooler.)
An inter-realm, inter-universal entity (Sarconigus) suggested that Lady Pegasus originally came from the mixedbag realm due to the fact she had a Rainbow colorscheme, her weapons were Rainbow-colored, and her Rainbow Blast ability.