What happened to the old version of con-quest on Itch? I played it maybe two years ago and it was basically the same game but different characters and rooms. Started off with the chick wearing the Pikachu costume 

We have a full archive of news posts on Newgrounds and Patreon. 

https://cuddlepitgames.newgrounds.com/news/1

if I'm not wrong, the game was discontinued due to copyright issues, so the game dev instead of changing every character, decided to just leave it as it is, and create an entirely new game

I read a bit through the newgrounds news and couldn't find any specifics besides an engine switch/overhaul