Simple in game test, don't care too much about other gens so Gen 6 only is fine. Use Pursuit on a Darmanitan being sent back. Deal enough damage to drop it below 50%. Does it activate Zen Mode before going back?
ok more tests: 1. Does Zen mode change before or after hazards upon switch in? 2. [Hackmons required] Darmanitan with any ability other than Zen Mode using Transform against a non-Darmanitan pokemon with Zen mode. Does Zen mode activate and override the transform? If so, how does reverting work?
^ Fuzzy is nerd as always. K let me make it even worse? "Darmanitan will revert back to Standard Mode outside of battle and enters battle in Standard Mode, even if its HP is below half." this is from bulbapedia Assuming it only changed form at the end of a turn, will it transform nonetheless when his HP is below half before battle started, or if it needs a hit to activate... "This Ability only works on Darmanitan, even if it is copied by Entrainment or Trace. Zen Mode cannot be copied by Role Play or swapped by Skill Swap." btw, to test the 2nd of above, perhaps u need to real hack sth :V transform not affected by snatch, so rip snatch. u need to hack to let darmi to use transform...and u need to trace Darmanitan's zen mode, since Darmanitan cant learn Entrainment...