Quoted By:
Both Regigigas and Slaking with no ability (rather than their terrible abilities) would struggle to climb out of UU. Return is gone so Normal has no good attacking moves. They have pretty lackluster movepools even taking into account their massive attack stats. They're like Kartana in that regard, but Kartana has dual STABs and coverage options for most Pokemon that would attempt to wall it.
IF Return came back and was 102 base power like before, they might be able to squeak into UUBL. They'd probably be OU for a couple of months as new toy syndrome causes people to overhype them, see: Glastrier, Regieleki, and then they'll fall down in usage.
