Fletchling first appeared where it swooped down to take a berry that Bonnie gave to a Dedenne. Afterwards, Froakie challenged it to a battle but Fletchling's speed and strength proved to be too much for Froakie. While Ash was trying to restrain Froakie, Fletchling attacked them on them and flew off. Ash and his friends followed Fletchling where it set them up with a swarm of Beedrill. After the group ran away from the swarm, they relocated to a canyon where Fletchling met them there and had a rematch with Froakie. Again, Fletchling's speed had the advantage over Froakie, but Froakie made a sculpture of itself out of its Frubbles to distract Fletchling. With Fletchling thrown off guard, Froakie was finally able to land a hit on the Tiny Robin Pokémon. Ash threw a Poké Ball at it but the capture was unsuccessful. Froakie continued the battle with Fletchling and landed a hit with Water Pulse. Ash threw another Poké Ball at Fletchling and managed to catch it this time. Ash then sent it out to show it to Clemont and Bonnie. Clemont gave Fletchling, along with Froakie and Pikachu an Oran Berry and Froakie shared the Oran Berry with Fletchling.
Prior to being caught by Ash, Fletchling would steal food from other Pokémon as shown when it took a berry from Dedenne. Also, it was mischievous as it led the group to a Beedrill swarm. After Ash caught Fletchling, Fletchling warmed up to the group and became friendly towards them.