After defeating the elite four you can finally face the champion of Sinnoh so you will become the champion. As soon as you enter the room an adrenaline rush hits you your heart was pounding…it was your chance. After calming down you look up and see the champion

Cynthia:"Before I send out my Pokémon, my heart always begins to race… Interesting… My Pokémon in their Poké Balls are radiating a happy feeling. Are you the reason? What are you?"

Cynthia seems suspicious about your potential