>>12383275Similar thing happened to me. SRing for a Landorus in Black. After about 2 hours I get a shiny one, end up trying to catch it while it's near 1 HP, sleeping, waste countless Ultra Balls / Dusk Balls on it. Never kept count of its PP usage but I knew it was close to zero so I had to use the Master Ball.
Tried my best to avoid using the Master Ball because it'd just look like any old cheated shiny, but had to do it.