An arena packed with beauty queens... I'm scared to go in there.
Bonding is a power introduced in Season 2.
Bonding is a phenomenon where a strong connection is created between two magical creatures, whether it be emotional or empathic. From the very moment two creatures bond, they become almost like family, and their powers are strengthened, sometimes to such a degree where their magic is increased exponentially. In some cases, bonding can even restore magical energy to one of the creatures involved.
The Shadow Phoenix
Bonding is only mentioned briefly during the pixies retelling of major events in Monsters on the Loose when Lockette, Amore, Chatta, Tune and Digit talk about how they were able to bond with Aisha's new friends, the Winx Club.