Reference article
Transformations
Cave power-up pickups transform the duck into four forms with different movement controls.
Finding forms
A power-up pickup chooses a remaining form from a four-form cycle, then changes the cave’s terrain pattern set. A harmful collision removes the current form before the normal duck’s protection checks.
Names and versions
Fire Bird, Golem and Wind Rider are recognizable source names. The ape form uses the internal name VineViper and Kong artwork; the creator confirms its public name is Kong King.