I get the feeling that at the end of the Legends Arceus trailer When Akari's expression changed from shocked to smiling I think it is that one of her Pokemon evolving. Because
Pokémon, Pokémon Legends: Arceus, Akari (Pokémon), HD wallpaper
Akari and Rei Character Profile
akari (pokemon and 2 more) drawn by hoshizora
Miipedia
Akari (Pokemon Legends: Arceus)
カグラ — hong
Akari in her happy place
Pokémon Legends Arceus Review
Akari (Pokemon Legends
Pokémon, Pokémon Legends: Arceus, Akari (Pokémon), HD wallpaper
Pokemon Legends Arceus Akari Rowlet Wallpaper iPhone Phone 4K #1421f
Pokémon Legends Arceus review: This time it's different
Anime Pantyhose Legs #943: Akari (Pokemon Legends: Arceus) stands next to the god of the Pokemon world and Arceus. Artist: Pretty Purin.