What is the pink head for?

[Guest]

By editing the variables. I found out, that Tux is getting a pink head if the var is set to 3 (0=small tux; 1=big tux; 2=fire tux)

Does anyone know what this is for?

[LMH]

That's for the Ice Tux powerup: Tux throws ice-balls that can freeze certain enemies. There are some addons that have the iceflower powerup, but I don't think there are any in the main game levels.

[Tlaloc1]

In Bonus World III, there is a secret level that lets you choose between the Fire flower and the Ice flower.