Before we solve the Riddle of the Sunrise Temple, we need to get there, right? First, from the Winter Palace, go south all the way up the mountain. Stay to the right until you get to this pipe. Slide through it.
Walk all the way to the top, past the Who You Gonna Call? Side Quest, down the ladder, past the bright and colourful Secret Zone entrance.
Follow the string of coins uphill until you see another white pipe.
At the top is a cannon that will take you to the Side Quest start. Talk to Professor Backback and he’ll tell you what to do.
The Side Quest Riddle entry says following:
“The sun beat down upon Pristine Peaks, sweat glistened on Rabbid cheeks…” — That’s the one to the left.
“Rabbids set themselves on a task, to sculpt a refrigerating stone mask!”
“It will brathe cool air upon our backs! But then came Cursa’s dark reprisal.” — That’s the one in the middle.
“The mask was corrupted with a Tentacle’s arrival. It’s icy roar threatened all survival.” — That’s the one to the right.
Riddle Solution
Rotate the Rabbid to the left so that it has a SUN on the head.
Rotate the Rabbid at the centre so that it has a MOUNTAIN WITH AN OPEN MOUTH on the head.
Rotate the Rabbid to the right so that it has a MOUNTAIN WITH TENTACLES on the head.

Now you get a Planet Coin. Don’t forget to get the extra reward! Off to the next riddle!
This is MARIO AND RABBIDS: SPARKS OF HOPE
Release: October 20th, 2022
Developer: Ubisoft Milan and Paris
Publisher: Ubisoft
Official Website: https://www.ubisoft.com/en-gb/game/mario-rabbids/sparks-of-hope
Guides by camzillasmom.