Magic Sticky Notes (Universal Story)

Ash made a wish, and a box of sticky notes and a pen appeared.

The notes were magic. All he had to do was write something on the note, then stick the note onto someone and they would become whatever was written on the note. So if he wrote 'Eevee' on the note and stuck it to the back of say, Misty, then Misty would become Ash's Eevee, and be viewed by the world as such until he swapped the notes or took the note off her.

Ash, with his box of notes in hand, headed off to test them.