To add the Neopets ‘I Taunt the Pant Devil’ avatar to your collection, you need to have any single item valued at over 1 million neopoints or combination of items in your inventory with a combined value of 5 million neopoints, and refresh. Some combinations of items include:

54 x Hasee
58 x Ice Conker
125 x Sand Snowball
9 x Baby Paint Brush
1 x Air Faerie Crown
78 x Bone Sceptre