I just had a thought, what if the Pokedex Holders had a little クリスマス party? または playing some game? Sounds intresting, doesn't it? So, here's how I'm imagining the Pokedex Holder's celebration party....
P.S.: Sorry if I have grammar mistakes...

The snow was falling slowly outside and the wind was blowing gently, the clouds were covering the bright moon and stars of the midnight sky...

Most of the hotel's rooms were dark and the floors were empty as it was finally midnight and everyone was sleeping. One room's light, however, was still open. The one in which the Pokedex Holders were still celebrating......