While exploring an ocean biome in my pixelmon world, I encountered around 7 mega blastoise within close distance of each other and 4 of them were shiny.
Since starting the world, I've encountered 2 shiny Mega Charizard Xs (about 4 of that mega total), least 4 mega charizard ys (none shiny), least 5 mega Venusaur (again no shiny), and more than 10 mega blastoise with at least half of those as shiny.
Part of me is wondering if this is a bug in the spawn rate and shiny chance of mega boss pokemon. Cause shiny pokemon and boss pokemon are supposed to be a really rare encounters in the wild, yet 4 shiny mega blastoises spawned within like 5 ft of each other in the game (even got a screen shot of it if you want to see).
I'm a little confused as to whether or not this is a bug, so I figured it would be best to ask in case it is.