So okay, I read that those fights are supposed to be in the 20th floor, the Leveling Dungeon, but are there some special things to be done before you can access those bosses? I completed all the Taiga Quests, I beat the "Bossmonster" in the Leveling Dungeon, but there is nothing, what am I doing wrong here?
But not even a single one of them appears for me, do I have to do something special?
from what i read you need to complete your servant SG to fight the 3 secret boss
First boss: Rin & Archer (F/SN) Left side of the map
Second boss: Kotomine & Lancer (F/SN) Right side of the map
3rd boss: Twice H.P & Caster (Fate/EXTRA) Topmost part of the map
I fought them on my first playthough using Saber (complete SG)
Twice Caster, you just can't cope with your future self's success in her love life. And that KICK! --- "Luna, I'm afraid he's right. You can't go around calling people that, even if in this case it appears to be the truth." - Sena