Simple. Are there any other pieces you would use as victory fanfares for certain characters?
I would change the victory fanfare for all the playable Pokemon. Pikachu, Jigglypuff, Charizard and eventually Mewtwo would have a re-orchestration of the fanfare that plays when you successfully capture a Pokemon in the original Pokemon games and their G3 remakes. Lucario and Greninja would have the Pokemon capture fanfare from G2 onward. It's strange that they don't do that.
I would change the victory fanfare for all the playable Pokemon. Pikachu, Jigglypuff, Charizard and eventually Mewtwo would have a re-orchestration of the fanfare that plays when you successfully capture a Pokemon in the original Pokemon games and their G3 remakes. Lucario and Greninja would have the Pokemon capture fanfare from G2 onward. It's strange that they don't do that.