First go into your air file and make one blank animation lets make this one

8675

now as a reference Hyper Gogeta striple kamehameha bomb blows the opponent up so he isn't there.

the reason is because he is in a custom state

Make a regular anim with your hitdef and such but at the bottom of that hitdef

put this

p2stateno = **** ; statedef of ur custom state

that means if it connects the opponent goes into that state

now make the custom state now where it says

type = changestate

remove changestate and put

SelfState

BAM

got yourself a custom state.

Example:
[State 200, 1]
type = HitDef
trigger1 = AnimElem = 2
attr = S, NA
damage = 23
getpower = 80
animtype = Light
guardflag = MA
hitflag = MAF
priority = 3, Hit
pausetime = 7,8
numhits = 1
guard.sparkno = S1905
sparkno = S1
sparkxy = -10,0
hitsound = S1,8
guardsound = 6,0
ground.type = High
ground.slidetime = 5
ground.hittime = 11
ground.velocity = -1.9
airguard.velocity = -1.9
air.velocity = -1.3,-3
p2stateno = 111

;---------------------------------------------------------------------------
; Victim Hit States
[Statedef 111]
type = S
movetype= H ;Get hit
physics = N
velset = 0,0
anim = 8675 ; the blank anim you made
ctrl = 0

[State 890, 1]
type = selfstate
trigger1 = 0
value = 8675 ; the blank anim you made
ctrl = 0

any questions?