I found and caught a shiny Magikarp, but I accidentally used my masterball, so I sacrificed the Magikarp and loaded backup save data to save the masterball since I already had the entire Magikarp line shiny.

Sacrificed to the Tatsugiri.

A shiny Heracross that appeared that I sacrificed for Cobalion.

Although I never saw the shiny, I was pretty sure it was a Pancham since they spawned up there. Unfortunate I couldn't catch it due to time running out.

Was looking for Tatsugiri, but there was no Tatsugiri, so I sacrificed it. It was the guaranteed shiny from the donut.

A second shiny Hawlucha that we had to sacrifice for the sake of keeping the Latias hunt going.

Random shiny spotted while in a Union Circle, but it was despawned.