Now this might be a noob of a question, but its been 5 years since I last played this game. You can fight and defeat Ultimate Weapon right after he attacks Mideel right? Coz I spent an HOUR last night trying to find it. I remember the last time I played the game I just chased right after the attack and beat him a couple of times up to Cosmo Canyon, but in my new game a little after the attack (I've just got Key Of The Ancincts) I just can't find him...

Does he appear after Diamond or am I am right and is he available for an ass kicking now?