How can I tell a Pokemon is a shiny in Pokemon Sun/Moon specifically?

The exact question here just with a different game in the series: How can I tell in battle if a Pokemon is shiny?

Except for Pokemon Sun and Moon. How can I tell a Pokemon is a shiny? Is there anything special in this game that is different than the others?

Old indicators of shininess still apply, colouration as well as the battle animation as discussed on the linked question. The only change will be with the new interface.

There is still a red star at the lower left to indicate shininess, just below the Pokemon's sprite. This is on the lower screen of the DS, at the Pokemon summary screen.