Available in the Kyoto Pokémon Center are Mario Pikachu themed card games, card game cases, a 3DS LL cover, Mario Pikachu Mario and Luigi plushies, t-shirts, notebooks, and more.
If you want an awesome item from this very limited run (so far) crossover, you better head over to Amazon Japan or Yahoo Japan and get it before the prices skyrocket.
The line released on October 29, and as of right now there’s no announcements for a further Japanese or Western release.