These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
I don't think the Pokémon universe is so cheesy that it would actually make a wishing trinket come true. The real point on that thing was as a clock of sorts, to remind the viewer what night it was. And it worked quite well.