Special Energy Edit
Special Energies are easier to discard that Basic Energies. However, Special Energies are better than basic energies. The standard 4 card limit applies to special energy, but not basic energy. A special energy will count for your energy attatchment for that turn.
Double Colorless Energy Edit
Provides # # energy. Does not provide any other types of energy.
Strong Energy Edit
Can only be attatched to Fighting type Pokemon.