The "OC" stands for off-center
It has access to an underhanded move with its Dark Signal ability, allowing it to swap the opponent's active Pokmon upon evolution to drag out a weak or weakened foe to take down with Max Darkness
If it has any abilities or flavor text in addition to its chapter abilities, those abilities and flavor text will be in a separate part of its text box under its type line
BOX: 7,000 26,350 a 3.8 increase
For example, let's say your deck has Overrun in it
Racing is exceedingly rare, as the only time you're likely to be in a race is at the beginning of the game, when you and your opponent have a large number of cards in hand (and thus responses that can interrupt the race), and late in the game, when the race is likely to be short-lived (1-2 turns)