Make sure the characters sprites are using palette 1,1 in the SFF. If they aren't, then you can do some modifying to make it work.
Add this to a CNS somewhere
;---------------------------------------------------------------------------
; Initialize (at the start of the round)
[Statedef 5900]
type = S
[State 5900, 1] ;Clear all int variables
type = VarRangeSet
trigger1 = roundsexisted = 0
value = 0
[State 5900, 2] ;Clear all float variables
type = VarRangeSet
trigger1 = roundsexisted = 0
fvalue = 0
[State 5900, 3] ;Change palette
type = RemapPal
trigger1 = 1
source = 1,1 ;; <--- Change this to the palette that the sprites are using. It might be 0,0?
dest = 1,palno
[State 5900, 4] ;Intro for round 1
type = ChangeState
trigger1 = roundno = 1
value = 190
[State 5900, 5] ;All other rounds
type = ChangeState
trigger1 = 1
value = 0
