This Vanillite is an Ice-type Pokémon owned by Trip.
He used it to try and catch a wild Palpitoad and it later battled Ash's Tepig. Iris has also been shown to be scared of Ice-types, so she has terrified look on her face whenever she sees Vanillite. Vanillite was also seen in a flashback in Mission: Defeat Your Rival! when its Blizzard tied with Tepig's Flame Charge. According to the editor, he thought Vanillite was his 2nd strongest Pokémon, after his Serperior.