Fledge's Confidence is a side-quest in Skyward Sword.
Luv's Stamina Potions
Just Need Some Energy, That's All
If you speak with Fledge from now on, he'll mention that you should come by and see him in his room at night. Head to the Knight Academy, enter his room (right next to yours) and sleep in his bed. You'll find him attempting to do pushups, but he doesn't get very far. Giving him a stamina potion encourages him to keep trying to get stronger. Later, (as in, after completing another dungeon) you can return and he'll have gotten further, but wants another stamina potion. The third time you come to him (again, after a long time) and he'll be a pushup ninja.
- Earliest first potion delivery available: After the Lanayru Mining Facility
- Earliest the second potion delivery is available: After the Ancient Cistern
A good while after you've given Fledge the second stamina potion, you can return to his room and he will show off and thank you. He wouldn't have been able to do it without your encouragement. He will then give you five gratitude crystals. Also, you can now play his Pumpkin Pull game near the Sparring Hall to win a Piece of Heart.
- Earliest available: After the Sandship