you, your Eevee, and rotom dex we're walking to the Pokemon School but you couldn't stop thinking about that weird dream you had last night until you see your Eevee run into the forest so you and rotom dex follow it and you all stop at a Pokemon you've never seen before

Eevee:curiously nuzzles it with its nose

Nebby:giggles a little bit

Rotom dex:scanning Pokemon no information found!? This might be a new pokemon!