Hey /vp/, I'm trying to RNG my buddy a shiny Nidoran on SoulSilver, and I can get the right Pokemon, as in IVs and Nature are right, but it's not shiny.
I've had trouble with this in the past too, stupid (not) shiny Ponyta.

I think it might have something to do with me having used an Action Replay on that game in the past. What do?