It's not so hard let me explain.
For example let's say we want algie with the grappler jocks fighting style. To do this you have to swap them.
This is algie full code. I will highlight what you need to change with green.
NDH1a_Algernon..
NDH1a_Algernon_W
........Fat.NERD
....STAT_N_STRIK
ER_B....
F_Nerds.
N_Striker...N_St
riker_B.Straf_Fa
t......./Global/
N_Striker_B.Act/
Anim/N_Striker_B
.act..../Global/
AI..Act/AI/AI.ac
t...N_Algernon..
....
This is luis full code. I will highlight it again
JKH2a_Lu
is..JKH2a_Luis_W
........Huge....
JOCK....STAT_J_G
RAPPLER_B...
F_Jo
cks.J_Grappler..
null....Straf_Wr
est...../Global/
J_Grappler_A....
Act/Anim/J_Grapp
ler_A.act.../Glo
bal/AI..Act/AI/A
I.act...N_Luis..
....
Now copy algie fighting style and paste it over luis one. Then the same the oposite way.
Algie will have luis figthing style (and luis will have algie's one).
If you don't want the other ped with a diferent fighting style (only algie modified but luis still normal), then do the change with an unspawned character like JK2nd_Juri_GS or JK_LuisWrestle