Instructions
Select the red Puffle after the mission begins. Use the Puffle to blow away the boxes that are in front of the door to the gift shop. Enter the gift shop and you'll see the Wheel-Bot at a large safe.
Select the pink Puffle to lasso the Wheel-Bot. This will probably take a few tries, so keep trying until the Wheel-Bot is tied up. He will then break through the ropes and continue trying to break into the safe.
Select the blue Puffle and use him to throw snowballs at the head of the robot. The Wheel-Bot will have his vision impaired and will leave the gift shop. Follow the Wheel-Bot through the hole that he makes in the door to the roof. Use the blue Puffle to throw snowballs at the Wheel-Bot again until his eyes are covered in snow.
Select the black Puffle and have him weld the wheel on the Wheel-Bot. This will knock the Wheel-Bot to the ground. Use the "Robotomy" tool on the chest of Wheel-Bot to gain access to a minigame. This game involves removing three robot parts from his interior.
Use the stylus to maneuver the robot parts from the beginning of each maze to the black hole at the end. Try not to hit the edges of the maze more than a few times or you'll have to start the maze over. Complete all three mazes successfully to deactivate the Wheel-Bot.
Select the purple Puffle and use him to create a bubble around the Wheel-Bot to capture him. Use the Stylus to select the captured Wheel-Bot, then bring him to the gadget room to complete the mission.