Im not 100% sure but I think I know whats wrong with the first one and with the one with Darby.
Okey the first one :You changed Jimmy's stats in pedstats.dat , and over wrote null points. You made Jimmy to not spawn in free roam look at the yyyy/global and at the 4 sqares near /global. You also added null dots here same as with darby. Explantion about why you cant edit points will be down below :
and for the Darby one you edited his fighting style to his boss style and you add 1 dot = .
Now those dots are not regular dots they are null dots. You cant replace the A with a null dot , it will cause your game to crash. I will use Darby as an example. To give someone a fighting style you need to check if he has the followings : Enough room to put the fighting style name in /Global/P_Striker_A.Act/Anim/P_Striker_A.act....
P_Striker_A = 11 Letters , Then you can only replace it in another 11 letters fighting style like :
J_Striker_A
G_Striker_A
B_Striker_A
Ect...
and to have enough space to replace the letters in the action tree with the special words that the fighting style must have in it , or else it wont work correctly.
For example Darby's fighting style needs the word : Boxing in the action tree (I think there is another word that needs to be in it , I dont know which is it..) Darby's Action tree looks like this :
...F_Preps.P_Striker...null....Straf_Prep.. It goes from the Stat_P_Boxing to /global but with out the /global
This may not be 100% true. If I am wrong please correct me so I will learn for the next time.