Due to a bad fall she took as a child, breaking her arms, she learned to kick Poké Balls with her feet. Although by now her arms have been completely healed, Crystal has retained the habit of kicking her Poké Balls instead of throwing them. She has caught all non-legendary Pokémon for Professor Oak
She later adds Hoenn Pokémon to her collection and apparently begins to work full-time as one of Professor Oak's assistants.
Crystal's special skill, as described by Professor Oak, is Pokémon catching, and she is known as the "Catcher"

He meets Crystal at her workplace, at Earl Dervish's Pokémon Academy in Violet City, and hires her services. But first she asked for something in return. Since the Academy was so worn down she said if she was to help it had to be repaired, which was allowed. After catching all of the Pokémon in Cherrygrove City, she departs after giving them to Oak, stating that she didn't need anymore teammates and they were caught purely for research purposes. Once she leaves Oak and Elm talk about her and Elm reveals that a Chikorita which still was at Elm's lab far after Totodile and Cyndaquil. Hearing that Crystal wasn't interested, Chikorita was devastated and went off to convince her himself. While Crystal initially didn't want it and thought it wasn't strong enough she was impressed by its spunk and courage and switched it in for Chumee