[quote=Shadowcatcher]
correct me if im wrong, but im about to write the timeskip and i just want to make sure im clear on one thing so i dont look like a fool co-GM. okay. we are fighting a random boss in a random tower, not the floor boss that advances all of Aincrad to floor 21, correct?or, is it the opposite? Are we about to face off against the actual boss of floor 20?
[/quote]

I'm pretty sure it's the boss of the 20th floor xD Because we talked about 'the floor's boss' who was hidden on a different area than most other floor bosses, being the 17th floor of the gilmer's tower.