He does not have the monster in his inventory, and has not responded since confirming the trade. I attempted to reach him before stating he would be flagged for not completing the trade. See images.
Watch Chanco21's water team vs. PHKES5's water team.
Chanco21 has a 1251 PvP rating and his team features 2 invincible, 1 counter, 1 shield, and 1 swap for actives.
This video explains how to properly use the Swap ability on Battle Camp. It also describes a method you can use to become better at it. All mechanics and calculations behind Battle Camp gem-matching are explained.
Backed out of trade after 24h.