Hi biskut! I've moved your thread to the Q&A section so people can best help you out. :) Please mark the thread as "Answered" once you're satisfied. (You can do this with editing the first post, you should see the option there.)
So you're interested in Beyblade Burst, right? The first thing you need to do is figure out which brand you want: Hasbro or Takara-Tomy. Which country you're in will affect what's easier to access. For instance, Hasbro sells in the US. You may want to simply buy what's easiest for you to get.
If you need to buy Beyblades online, unless you can find everything through
Hasbro's website or
Entertainment Earth, you're better off buying Takara-Tomy (and then
this thread may be very helpful). TT prices on sites like eBay are more stable than Hasbro, but you have to watch out for counterfeits, which may contain lead.
Takara-Tomy makes the best stadium (
Burst Standard Type, labeled as B-09 for white and B-33 for black, on its own) and better launchers. It's fine to use these with Hasbro Beyblades, just not in Hasbro tournaments (if you have local stores that hold them).
If being comeptitive with "the big kids" isn't too important and your nephew just enjoys the show, I suggest learning which Beyblades are your nephew's favorite and buy those up. The TT stadium will work out better for gameplay though, as Hasbro's stadiums have obtrusive pockets and sometimes holes that get in the way.
As a note, you can't mix the tops&bottoms (layers and tips/drivers) between brands, so many people simply get only Hasbro or only TT of the Beyblade tops themselves. Buying TT lets you get the latest from Japan, with Hasbro being some 6+ months behind, so those who are rather competitive tend to lean toward TT so that they can "keep up" with the latest (though this is no good in a Hasbro-only setting).
I'll stop it at that for the moment, since that's a lot already.
[[ Michigan Blader | Avatar photo by
Ivan Kislov ]]