Misty, watching from the Kanto bench, is worried about Brock's chances of winning. Sitting next to her, Erika wonders what Jasmine's specialist type is, as she put out three Electric-types and two Flying-types before choosing who to start with. At that moment, Amphy is floored by an Ancient Power from Brock's Kabutops. It gets up but struggles. Retrieving Amphy, Jasmine declares to Brock that she also trains Rock-type Pokémon as well. She thus calls forward what Brock thinks is an Onix; Brock responds by switching for his own Onix.
Brock questions whether his Onix's opposite number is a mutation or a rarity, then, without warning, orders his Onix to bind its target. To Brock's bewilderment, his Onix begins to recoil from the impact. Mary, commentating on the battle, marvels at the powerful defense of Jasmine's Pokémon, and believes this is why she is called "The Steel-Clad Defense Girl". Suddenly, rocks begin to fall off Jasmine's Pokémon. It eventually shakes off its rocky disguise to reveal itself as an iron serpent. Jasmine, taking advantage of the confusion stirred among Brock and the Kanto bench, orders her Pokémon to use Crunch. Brock's Onix is knocked out, and Jasmine is declared the winner of the match.
After Brock takes another look at his opposition, he is shocked to hear from Jasmine that her Pokémon used to be an Onix, and thus, evolved from an Onix. The revelation also shocks the audience, who realize that the victor is an entirely new species. Mary thus contacts Professor Oak, and he appears on the stadium screen to announce his research on the new Pokémon. Oak announces that little was known about the species in question until an instance of it was found and caught in the wild by one of his dependents, and thus the species will be officially recognized by the name of Steelix. Oak also hinted that after the relevant authorities are contacted, a Steel-type may also be recognized, with Skarmory and Magneton among those that will belong to the group.
Jasmine then admits that because an unknown species would scare the audience, she deliberately coated her Steelix in rocks to make it look nicer. The scoreboard eventually updates, bringing the Johto team into an early lead.