Here's why:
* G represents the power level: In the Bakugan universe, G stands for "Geogan Power" or "Gravity." It's a fundamental measure of a Bakugan's strength.
* No G means unknown power: A Bakugan without a G value doesn't have a defined power level. It could be extremely weak or incredibly strong, but you wouldn't know without the G value.
* G is crucial for gameplay: G values are essential for battles in the Bakugan game. They determine a Bakugan's attack power, defense, and other abilities.
In short, a Bakugan without a G value is like a character in a fighting game with no stats. Its strength is completely undefined.