Well this is exciting! Your class took a trip to Johto from (whichever region you please.) Halfway through the trip, you strayed from the rest of your group, chasing after a Cyndaquil. You found yourself in the heart of the forest after chasing it for a few hours, no one could hear you.

You looked around for a while, before you came across a group of Pokémon, all sitting while looking at a.. bush? You hid, and out the bush that they were looking at emerged the one and only Celebi. This makes quite the rare sighting.

Celebi seemed to be tending to the Pokémon surrounding it, before looking at the bush in your direction.