While not bosses, Boo and Big Boo can be formidable adversaries, especially when controlled by an opponent. They can steal your hard-earned coins or even Stars. The best defense is to keep your coin count low if you're a target, or to use a Super Star to protect yourself. Offensively, saving coins to use Boo or Big Boo yourself is a powerful strategy.

Boo/Big Boo Strategies:
- Defensive: Keep coin count low, use Super Star.
- Offensive: Save coins to use Boo/Big Boo to steal from opponents.
- Anticipate: If an opponent has many coins, expect them to use Boo.