Pokémon : S5 | E43 – Fangs for Nothin’

Kaburagi takes his position as the battle judge, and announces that Ash will face Blackthorn Gym Leader Clair in a three-on-three battle. Clair leads with Kingdra, which Ash responds with Pikachu. Pikachu tries to Thunderbolt Kingdra, and despite a direct hit, Kingdra easily shakes the attack off. This puzzles Misty and Brock. Kingdra responds with Twister, which catches Pikachu. However, Pikachu manages to recover, and launches a Thunder attack, only for Kingdra to shake it off as well. Ash is also confused by why Kingdra is easily repelling Pikachu's attacks, to which Clair replies that, though Kingdra is evolved from a Seadra, a Water type, upon evolution it gains the Dragon type as well. Kingdra continues the battle with Hydro Pump, which Pikachu returns fire with Thunderbolt.

Meanwhile, Jessie is lamenting the loss of Dratini, but is cheered up by the prospect of food. As Jessie is planning her revenge against Clair, the food meant to cheer her up is stolen from right under them. Though Wobbuffet notices this, and the others instantly blame him for eating the food after hearing a similar voice, which is actually a hidden Wynaut. However, they do manage to formulate a plan to steal the Dragon Fang.
(Source: Bulbapedia)