Having arrived at lake Acuity, Mew waited for Uxie to come out. If everything was going well, Mesprit should've told Uxie Mew was coming.
The lake wasn't covered with ice, only the grass and the trees were covered in snow, as it wasn't as cold as it was further back towards mount Coronet. At the side of the lake, Mew could see Ursaring and Teddiursa playing near the water. The Teddiursa were chasing each other while the Ursaring were watching over them to keep them safe.
Deeper in the forest beneath the trees, Mew could see a lot of Snover and Abomasnow enjoying the pleasant freshly fallen snow, waddling through it towards the mountain.
Waiting for Uxie, Mew turned into a Teddiursa and joined the others in chasing each other around. They were playing tag and they squealed in happiness as soon as they tagged the other.
When the Ursaring came to get their respective Teddiursa, Mew changed back and giggled when he saw the shocked faces of both parent and child. Mew happily turned around in the air, hopping from on Ursaring shoulder to the other, passing around sweet Oran berries as he too was getting a bit hungry.
When a ripple finally appeared in the center of the lake, Mew waved at Uxie who was looking around is search of Mew. Seeing Mew playing with the Ursaring, Uxie soon joined them to snack on some Oran berries as well. Unlike Mesprit, Uxie was calmer and more introverted. Still, Uxie would giggle when Mew pranked the other pokemon.
As he had done with Mesprit, Mew followed Uxie through the lake, watching as the lake bed was overgrown with blue and white coral. It seemed like the cold had made the plant life in the lake change, as only white and blue coral was found. Every once in a while, green kelp and algae were found, but Mew liked the blue coral more.
Hanging on to a group of Golduck who proposed to let them sit on their back as they would swim around with them, Mew and Uxie raced with the Golduck as they cheered on the Golduck they were sitting on to move faster.
Eventually Uxie's Golduck won, causing Mew to pout in dissatisfaction. Thanking the Golduck for playing with them, Mew followed Uxie into the special space, only to be shown an absent Adamant orb.
Uxie seemed very sad, explaining it had disappeared a little while ago as a strange vibration had went through the subspace. Uxie was very down as he told Mew about it, even telling the same had happened to Azelf, who had guarded the Lustrous Orb. They both couldn't wait to see the orbs being returned.
Mew promised to look out for it if he saw it, after having received a mental image from Uxie. At those words, Uxie became happy again as they enjoyed the rest of their day with the Golduck and the Ursaring family till the day became night.
Sleeping over at Uxie's place, Mew and Uxie curled up together on a soft bed of white/pink clouds. Their tails were all interlocked as they clamped on each other and both dreamed about delicious food, drooling when they were about to eat it.