Now, let's talk about the metagame:
Hacked tier shift
Premise: every pokemon can have 1 illegality for each tier under OU they are (1 for UU, 2 for RU, 3 for NU, 4 for PU). An illegality is an illegal ability, an illegal move or removal of EV limit (counts as 2 illegalities).
Clauses: OU...