i am level 100 without cheating to all charaters have all magic and all gfs i am indestructable um wait i seem to remember fighting a creature called tonberry king uh easy ultima weapon get a hard boss please OMEGA WEAPON ahhhhh he is too good and blow me down i used 3 lion hearts to kill him lol and on ff10 there is a secret boss i cant remember his name it isnt the 1 you battle doing captures of the fiends anyway if you know the one im talkig about i cant even beat him with that sword aeon guys zamnato so big help needed lol.
If you’re talking about Nemesis, then just have your party do Quick Hit on him until his turn comes up, then pull out an Aeon to take his attack. Don’t use Overdrives, because he counters them. That’s all there is to it.
Xelo, he said (somewhere in that mess) it wasn’t the one you fight by capturing.
Which means to get to it. You need to beat all the Dark Aeons scattered around Spira. Including Dark Ixion twice, and Dark Yojimbo five or so many times. Then he appears, don’t know where, never bothered myself.
To get the new location on the Airship (ie Richter/Penance) you gotta defeat every Dark Aeon. Check out some guide, it may be hard. You need to max your stats if you want a chance against it.
Maxed stats + high luck (both stat and real thing) + celestial weapons + Ribbon and Auto Phoenix on armors. Kill the arms first. They keep reappearing but if you don’t take them out bad stuff will happen. Recommended party: Tidus, Yuna, Wakka.