Well you forgot Blackwargreymon, but also how do you unlock merciful mode?
You're right, and Black WarGreymon. Merciful Mode you unlock getting every character from the upper row and 20 floppy disks. Then you'll need every character as "fusion material" at the right level. Then evolve Omegamon.
With the new update who got new final evolutions?
Hawkmon, Armadimon, Patamon 02 and Terriermon 02 :)