haha, i did see cubone/marowak charms at the a pokemon center, but unfortunately the original 151 are not as glorified as the more recent pokemon, and so you can't find their likeness rampant in merchandise.
i really like marowak COMPETITIVELY, which is why i love to gush about him, but otherwise, he's an awesome mon. i have on in my pokemon green playthrough right now, and he destroys everything (thank god abilities don't exist and nothing can levitate)
you will surely find something to sate your pokelust in tokyo though, fear not! glen is cool as a cucumber, i hope you guys hang soon!