Sky's devotion to his Marill is this and Tearjerker a tearjerker.
In addition Sky's relationship with his Sylveon he got as a gift from Mirshal, who he later starts to date.
Riolu finally evolving out of love and friendship. slightly averted since he evolved out of friendship with Nightshade and not his owner Minnie, but Nightshade and Riolu's relationship is still cute.
