Chosen skill used by new Pokemon after forced switch

Details: - Happened on the first trainer on the left in the Sonata City Gym (Lass Yvonne?) - Have Delta Sunflora out. Fighting against enemy Clefable. - Choose "fight", select "Sludge Bomb" - Enemy Clefable uses Metronome. Casts Whirlwind.
- Sunflora gets replaced by Zubat - Zubat uses Sludge Bomb (untrained) - Damage dealt indicates that the Zubat's stats were used to calculate damage