A Paint Tanker is an vehicle used by INKT to hold color. If Arty slams all 3 of the color loos (in Pingu's Adventures, the team calls them color holes), red, blue and yellow, she will have unlimited time of invincibiliy where she will be Alpha-Arty (the same as the Phantom Hero, Alpha) until you reach the end of the game. They only appear at the end of Last Resort.