people get pretty heated about this one for whatever reason so i try not to bring it up...but legit i dont see anything that damaging against it. simon doesnt have to be in code of a demo build, we legitimately have reason to believe richter may have been worked on first anyway, and he could be lying about how he got this info/saw the data to avoid getting caught leaking OR he could have had a substantial amount of time alone with the game. if he was trusted enough to help set up the game AND the demo is entirely public info at the time of CEO nintendo might have literally sent him a demo copy and he may have had it at his house for a significant amount of time OR it was sitting at CEO for a while and if he worked there he could do with it as he pleased and then just given it/sent it back after the event was over. theres too many unknowns to simply write it off as ridiculous imo. not saying its definitely true but it should be looked at.
Gothitelle is weird but it does have a logic to it, representing every gen of pokemon, and yeah its a weird logic but sakurai has been known to be weird like that in the past. Also this game has SO many characters, cutting corners by doing an echo fighter that works to achieve that goal could be realistic and get us someone odd like gothitelle just because it works out.
I'm not really invested personally in any pokemon (i think with pichu,ivysaur,squirtle back if we didnt get any new pokemon i'd be fine) so gardevoir/incineroar i dont really care which one we get but i still think the leak has enough going for it to be talked about and i am still leaning toward it. anyway not trying to get into a big discussion about it just laying down my thoughts.