Playing the special Poochy Dash bonus stages will allow you to unlock new costumes for the character. To change costumes, tap the Poochy icon at the bottom of the screen while in the Poochy Hut. (NOTE: To activate any Time Attack missions, you must scan the Poochy amiibo while in the Poochy Hut. You will not be able to play them otherwise.)

Costume	How to unlock
Burger Poochy	Clear the Time Attack in Fort Bombs Away.
Buzzing Poochy	Clear the Time Attack in Galloping Green Meadow.
Golden Poochy	Clear all normal missions in all six stages.
Moo Moo Poochy	Clear the Time Attack in Hotheaded Lava Fields.
Rocking Horse Poochy	Clear the Time Attack in Stitchy Scramble.
Warm Poochy	Clear the Time Attack in Bobsledding Peaks.
Watermelon Poochy	Clear the Time Attack in Zippy Lagoon.