It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

ZenScript
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import crafttweaker.api.entity.type.projectile.SmallFireball;

SmallFireball extends Fireball. That means all methods available in Fireball are also available in SmallFireball

ZenScript
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new SmallFireball(level as invalid, shooter as LivingEntity, xPower as double, yPower as double, zPower as double) as SmallFireball
new SmallFireball(level, shooter, 0, 1, 2);

Parametro	Tipo	Descrizione
Parametro level	Tipo invalid	Descrizione The level this entity is in.
Parametro shooter	Tipo LivingEntity	Descrizione The entity that created the fireball, used to get the position.
Parametro xPower	Tipo double	Descrizione The x power of the entity.
Parametro yPower	Tipo double	Descrizione The y power of the entity.
Parametro zPower	Tipo double	Descrizione The z power of the entity.

ZenScript
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new SmallFireball(level as invalid, x as double, y as double, z as double, xPower as double, yPower as double, zPower as double) as SmallFireball
new SmallFireball(level, 0, 1, 2, 3, 3, 3);

Parametro	Tipo	Descrizione
Parametro level	Tipo invalid	Descrizione The level this entity is in.
Parametro x	Tipo double	Descrizione The x position of the entity.
Parametro y	Tipo double	Descrizione The y position of the entity.
Parametro z	Tipo double	Descrizione The z position of the entity.
Parametro xPower	Tipo double	Descrizione The x power of the entity.
Parametro yPower	Tipo double	Descrizione The y power of the entity.
Parametro zPower	Tipo double	Descrizione The z power of the entity.