why does use of url in footnote (with special UTF8 character) produces strange reference?

Question

I want to reference the web-reference to the wiki https://en.wikipedia.org/wiki/Pokémon_Go.

If I paste it into a footnote

\footnote{https://en.wikipedia.org/wiki/Pok%C3%A9mon_Go}

I get File ended while scanning use of \@footnotetext.; if I add \url as adviced in How to use a link as footnote that has special characters inside? or escape the special characters I get:

\documentclass{article}
\usepackage{url}
\begin{document}
    
some text
\footnote{\url{https://en.wikipedia.org/wiki/Pok%C3%A9mon_Go}}
                % the conversion is automatically done when pasting (in texstudio at least)
\footnote{https://en.wikipedia.org/wiki/Pok\%C3\%A9mon\_Go}
\footnote{another footnote}

\end{document}

which results in references which look ok, but do not work (and are not clickable):

If I add \usepackage{hyperref} and combining all options I found, neither produces a clickable reference. What would be a working solution?

\documentclass{article}
%\usepackage{url}
\usepackage{hyperref}
\begin{document}
    
some text
%\footnote{\url{https://en.wikipedia.org/wiki/Pok%C3%A9mon_Go}}
                % the conversion is automatically done when pasting (in texstudio at least)
                % scanning fails
\footnote{https://en.wikipedia.org/wiki/Pok\%C3\%A9mon\_Go}
            % prints incorrect and non-clickable ref
\footnote{https://en.wikipedia.org/wiki/Pokémon\_Go}
            % prints correct but not clickable ref 
\footnote{\url{https://en.wikipedia.org/wiki/Pokémon\_Go}}
            % produces weird output
\footnote{another footnote}

\end{document}

The output is:

Answer 1

The usage table at the beginning of the url package documentation says:

\url{ }   The argument must not contain unbalanced braces.
      If used in the argument to another command, the \url
      argument cannot contain any “%”, “#”, or “^^”, or end
      with “\”.

\url| |    . . .

\xyz   for the defined-url “\xyz”; such a command can be
      used anywhere, no matter what characters it contains.

Section 2 (page 2) explains how to make a defined-url. In your case the definition would be

\urldef\pokebowl\url{https://en.wikipedia.org/wiki/Pok%C3%A9mon_Go}

to be followed by

\footnote{\pokebowl}

About clickable references, url.sty alone does not make clickable references. If they work when clicked, it is being done by the pdf viewer. You should use package hyperref for clickable links. (I'm ignoring obscure other possibilities.)

Finally, that footnote could be done better with different versions for the link and the text using \href, such as

\footnote{\href{https://en.wikipedia.org/wiki/Pok\%C3\%A9mon_Go}
   {https://en.wikipedia.org/wiki/Pokémon\_Go}}

or

\footnote{\href{https://en.wikipedia.org/wiki/Pok\%C3\%A9mon_Go}
  {Wikipedia: ``Pokémon Go,'' as of 2020/11/29.}}

Answer 2

The advice and explanation given by @moewe leads to a simple solution: use XeLaTeX or LuaLaTeX; the problems seem to be artefacts of pdfLaTeX.

I switched to LuaLaTeX and got the desired clickable references in my document.