Toven:

[etoven]

A werewolf can't pick and choose the times he becomes a wolf, that defeats the whole purpose of the legend. It's a curse you can't control.

Not in, native American legend. Native American's shamans could take the form of a wolf any time, any where. Also many variations of the American lycanthrope legends also state that the lycan could change at will with enough skill and concentration, and need not be bound by the phases of the moon.

From WikiPedia:

Werewolves, also known as lycanthropes from the Greek λυκάνθρωπος, λύκος (wolf) and άνθρωπος (human, man), are mythological or folkloric humans with the ability to shift shape into wolves or anthropomorphic wolf-like creatures, either purposely, by being bitten or scratched by another werewolf, or after being placed under a curse. This transformation is often associated with the appearance of the full moon, as popularly noted by the medieval chronicler Gervase of Tilbury, although it may have been recognized in earlier times among the ancient Greeks through the writings of Petronius.

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