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Well from a few post on Reddit there's also a random chance of encountering Alola Dugtrio and Golem. Taking a picture of Dugtrio is only accessible if a woman in a sundress and hat is onn the beach (she looks identical to the NPC who's at the street corner; wanting to show you off to her rescuer when she fucked up her foot) and apparently you can see Golem through the broken wall, across from the woman who takes you to meet up with the Mysterious Old Man
Pressing B rapidly makes Sun trip over himself
Spinning in a circle without moving makes Sun do a spin dance
You can touch Rotoms Eyes and he'll freak out