Constants:
In the ".asm" file you can change this:

    !ExplosionNumber = $06  ;Pixi slot used by Metal Slug Explosion

SFXs:
In the ".asm" file you can change these values to changes SFXs and if use 1DF9 or 1DFC:
    !ExplosionSFX = $72
    !ExplosionSFXAddr = $1DF9|!addr

Usage Example:
    LDA #!XOffset
    STA $00
    LDA #!YOffset
    STA $01

	LDA #!XSpeed
    STA $02
    LDA #!YSpeed
    STA $03

    LDA #!ProjectileNumber+!ExtendedOffset
    %SpawnExtended()
    BCC +
RTS
+
	LDA !PaletteOption,x
	PHA
	LDA !PaletteAssignmentOption,x
	TYX
	AND #$30
	STA !ExtendedPaletteAssignment,x
	PLA
	AND #$F0
    CLC
    ADC #$10
	STA !ExtendedPaletteOption,x
	LDA #$00
	STA !ExtendedMiscTable1,x
	LDX !SpriteIndex
RTS´

Notes:
    !ProjectileNumber is the pixi slot of of the this sprite
