Rufflet first appeared while Lexi and her friends were on Route 23 on the way to the Unova League. Looking for a last minute addition to her team, Rufflet appeared and she captured him. Despite the hastiness of its capture, Lexi focused on training him, resulting in him being ready for her League Battle against Marshal in B2W2-052.
Rufflet is a courageous and silly Pokémon, who often likes to make a fool of himself in order to make others laugh. Despite this, he's also shown to be very serious when in training or in a battle, but becoming embarrassed if things don't go his way, rather than becoming upset or angry.
Still very young, Rufflet has a very strong will which is very rarely matched; it offers itself up for battle no matter how strong the opponent.