At the Battle Café, Murdock notices that the Slurpuff cotton candy is not listed in the menu. Watching the café’s pastry chef be defeated by a customer, the group learns that the cotton candy is a reward for winning against the chef, who can only be fought once per day. Murdock recognizes the chef as a man named Mitchell, who likewise recognizes him and refuses to battle him. Murdock’s Alcremie tries to offer Mitchell some of her cream, but is left heartbroken when he refuses. Murdock explains that he and Mitchell used to be friends, but that was a long time ago. At Liko’s urging, he goes into more detail, explaining that the two of them used to run a bakery together while having a friendly rivalry between Murdock’s ruby cream cakes and Mitchell’s matcha cakes. That changed, however, when the bakery’s mascot Pokémon, Milcery, evolved into a Ruby Swirl Alcremie, which benefitted Murdock’s pastries more than Mitchell’s. This eventually led to an argument between the two, and Murdock left the bakery with Alcremie. While Murdock understands now that Mitchell would’ve wanted Milcery to evolve into a Matcha Cream Alcremie, he’s still not sure what to say to him to make up for what happened.
(Source: Bulbapedia)