are we talking about physical elements that are know
to exist
or ones that are subject to speculation in only a couple of papers?
Ones with atomic number >103. Whether they exist or not is a grey area.
They can generally be "made to exist" for short periods of time. I'm not
sure whether it's fair to include an element just because it *has* been
made to exist (for a millionth of a second) and exclude another because
they couldn't decide whether made it exist or not. Anyway, scientific
theories have a place in Wikipedia, right or wrong - provided they have
been published in reputable journals.
Question: Are there any "reputable" sources that publish articles about
Pokémon characters?
Steve