u/Adavakada

So I’m currently playing the first game >!I’ve already defeated aleph (at least on the train battle, idk if I’ll have to do it again)!< and I was wondering when was it settled since the new game is in 2002. Also I’ve seen people talking about other things such as cassette beast 235 (or something like that?). What’s that? The post game? Pls don’t spoiler, if I need to play more to find out, just tell me that. Thankssss