All the CDLC for RS2014 work by pretending to be the DLC for “Smashing Pumpkins - Cherub Rock”, because it was given away for free as a preorder. If you get any of the other delisted DLC, you can use Rocksmith Custom Song Toolkit to change the ID to one you own (free or paid, as long as you have a steam license for it) and it should work.

The usual fix from the Jellyfin docs would be to check you file naming conventions, and add the TVDB or TMDB show ID to the folder so that it scrapes it correctly, or use the Identify option like @Rudee mentioned to select a better match from the UI after import.

Both TVDB and TMDB consider Pokémon Journeys to be Season 23 of the original Pokémon show, the OMDB seems to list it as a standalone show though, so you could import and match it against that metadata.

Ubisoft logo design team: 👍