Here are the effect IDs:
EffectFire = 0;
EffectHearts = 1;
EffectBubbles1 = 2;
EffectBubbles2 = 3;
EffectCelebrate = 4;
EffectSparkle = 5;
EffectFear = 6;
EffectTerror = 7;
EffectSplash = 8;
EffectHeal = 9;
EffectLighting = 10;
EffectConfetti = 11;
EffectSplash2 = 12;
EffectFireBall = 13;
EffectShield = 14;
EffectFireRing = 15;
EffectBlueStar = 16;
EffectEnergy = 17;
EffectWhirlwind = 18;
EffectEgg = 19;
EffectBoulders = 20;
EffectHeavans = 21;
EffectBluePlasma = 22;
EffectDarkBeam = 23;
EffectBubbles3 = 24;
EffectDarkHand = 25;
EffectDarkBubble = 26;
EffectThump = 27;
EffectVines = 28;
EffectMud = 29;
EffectSwirl = 30;
EffectDarkWhat = 31;
Effect101ring = 32;
EffectGreenWoo = 33;
To add in new sfx, you will need a sound file in the form of a wave file (.wav). To add in new music though, you need .mid which is a midi file. You can find these online or make your own using
some programs (not sure which ones off the top of my head.)
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stay tuned.