I notice little patterns with the virtual console Pokémon when I transfer them to bank. For example, they always have hidden abilities and always have 3 perfect ivs or more(might be just me). So is there any real pattern or anything that happens to the Pokémon when you transfer them from the virtual console to bank.
Yes, when Gen I and II Pokemon transferred for the virtual console to Bank, there are some changes that happen to them. The list can be found here, but to sum the notable parts up: