The standard Challenge Cup is now replaced with Hackmons Challenge Cup. By extension, Challenge Cup 1v1 is replaced by Battle Cup 1v1, which will retain the old CC mechanics. This change is to provide variety on the format by allowing it to differentiate itself from Random Battle.
In addition, Battle Factory is added. It's a new format with a similar concept to Random Battle, but the difference is that it's focused on tiers, everything is set to level 100, and all sets are intended to be competitively viable!
—Dell on May 16, 2015