While on Akala Island, Gladion
went into a cave and Gladion's Type: Null was revealed when it was released from its Premier Ball. He didn't want anyone to see it and it was restless due to the muzzle helmet on its face that couldn't be removed that time to make it a lot more comfortable. Unlike the games, it appears that Gladion's Type: Null / Silvady can change back and forth by wearing the restraining helmet and is not treated as an evolution as it initially was a Silvady then a Type: Null and then a Silvady.
became unable to touch Pokémon because she was attacked by an Ultra Beast. Gladion
was so terrified he wasn't able to save her but Type: Null saved them. Gladion
told Ash Ketchum
the story because he trusted him but he's vowed to protect her so that she'll never experience anything that frighting ever again by becoming a Pokémon Trainer and become stronger together with his Pokémon for the purpose of defeating every single Ultra Beast there is. Because of that experience, he believes they are creatures that bring misfortune to mankind and that they should not exist in this world, including Nebby
Silvady is a Pokémon that was created to defeat Ultra Beasts. Gladion
didn't want to go into detail about its creation but he explained to Ash Ketchum
that nobody must know about Silvady's existence. After Lillie
was captured by Faba
to wipe her memories again, Gladion's Type: Null broke through its helmet they had been trying to take off to reveal that it was a Silvady and it then turned into a Dark type. It once again fought Faba
and rescued Lillie
remembered what had happened before and thanked Silvady for rescuing her and gave it a hug, touching it and finally getting over her fear of touching Pokémon now that her memory was restored.