According to a 4chan post (read at your own discretion) & serebii forums some hacked Pokemon have gotten through to the Pokemon bank, save a few banned ones.
*Possibly four versions after x/y for gen VI confirmed
*Hoenn possibly confirmed
*Illegal pokemon confirmed to be blocked during transfer
-from serebii forums
*Illegal Pokémon are "confirmed" transferable not "confirmed" to be blocked.
*Illegal Pokemon are blocked, such as illegal movesets, or illegal shinies.
What get's stopped:
*Illegal shinies (Victini, Arceus including a Hall of Origin shiny Arceus)
*Some near impossible shinies (WISHMKR, Jirachi)
*Illegal movesets (V-Create Chimchar)
*Shadow Tag Chandelure (?????)
*Possibly four versions after x/y for gen VI confirmed
*Hoenn possibly confirmed
*Illegal pokemon confirmed to be blocked during transfer
-from serebii forums
*Illegal Pokémon are "confirmed" transferable not "confirmed" to be blocked.
*Illegal Pokemon are blocked, such as illegal movesets, or illegal shinies.
What get's stopped:
*Illegal shinies (Victini, Arceus including a Hall of Origin shiny Arceus)
*Some near impossible shinies (WISHMKR, Jirachi)
*Illegal movesets (V-Create Chimchar)
*Shadow Tag Chandelure (?????)