Reference article
Purple Swoop Duck
Purple Swoop Duck is a local rival who offers a race in Volcano.
Challenge
Speak to this duck in 
Volcano to enter 
Purple Swoop Duck’s Race. There is no specific level requirement to enter.
Dialogue
This place is great! There's so much jumping and climbing ...and people just leave things on the ground like this orange key. Want it? Then beat me in a race!
Race guide
See Purple Swoop Duck’s Race for the course and rewards.