BioHazard said
None of the group is really able to fight the other organization on the same level... right now. I assume that Joshua also wants to show how strong this group is with these fights. Although it won't be long before we beat the Six Senses.
So it really is the obligatory unbeatable boss fight.
Always hated those XD
Personally if this big bad group had LET the Keybladers win or let them go after a brief tussle of just toying around with them (and made either factor incredibly apparent) that could get the message across that they can't do shit to their group better than: 'Imma gonna beat the shit out of you and you can't stop it'.
I mean with Lucus it took all of them (cept Reno and Thomas who were absent), several of the veterans, and a bunch of Nobodies (all puns intended, sorry, I couldn't resist XD) (jk jk) to stop him. That right there showed the incredible level of the other organization by pretty much saying that you would need an entire battalion to even get close to beating one of us.
Sorry if I seem rantish, but I never really liked the obligatory "you automatically lose and are gonna get yer arse kicked boss fights" (as it makes me just wanna stop trying if there's no way in hell to win).
But yea, that's my opinion on obligatory loss from the get-go boss fights.
Its not that I hate losing, I just hate when the outcome is set to automatically losing (its one of the reasons why my RPs have game systems attached to them, means that the outcome of any situation is never set in stone).