How do I beat cybeast greagar ignor the other question and if you know..

Do not bother using AR,GS,or CB to cheat to beat Gregar...it takes the fun out of it...and often causes irreparable damage to your save file...simply turning off and removing the device/codes will not rectify the problem...my best suggestion to beat him...is you don't think your folder is upto par...go around and find SP versions of Navis and attempt to beat them...modifying your folder till it is capable...I believe if you need to...I posted my folder on the MMBN6 Cybeast Gregar forums a WHILE ago...another good tip...and Im sure other here will agree...Get a BugStop NCP...and the two NC Expansions(...wait can't remember the name of the item that does it...oh well...)then you can add stuff into the perimenter
Like this...all "X" spaces can be filled...all "O" spaces cannot...I can't remember how many rows/colums there are so Ill guess:

[O] [X] [X] [X] [X] [X] [O]
[X] [X] [X] [X] [X] [X] [X]
[X] [X] [X] [X] [X] [X] [X]
[X] [X] [X] [X] [X] [X] [X]
[O] [X] [X] [X] [X] [X] [O]
You may have already figured the above trick out...but You asked for help...you see the general area of the screen...but you can stick pieces off the border as long as at least one block of the NCP remains...and lastly...collect as many HPMemory's as you possibly can...they will be essential in beating him...oh and a final hint...play Gregar continuallly...intending on losing...its how you learn his attack patterns...

Beat greagar once (story mode last thing).

Well, you do not need to use chip as you use slash man cross, then just keep dogging and when he use the fire/eletric attack, attack him from above.