Pokemon Masters EX - 5/5 EX Serena solo Cobalion 

Grid & Lucky Skill : ng-pomatools.w...
Saw a Japanese player trying this run on Twitter and almost did it so I wanted to try myself.
Bar 1 : You can only get hit by Aerial Ace and you don't want too much Sp.Def debuff so you can use 2 to 3 Fire Spin after your 1st Sync and before half bar. Pray for max roll sleep time and kill Bar 1 to have Lessen Sleep 2 on Bar 2.
Bar 2 : You can get hit by Swift and allow Leer since you have Impervious. You want to have at maximum Lessen Sleep 4 for Bar 3.
Bar 3 : You can only get hit by Sacred Sword (hope you have enough Attack debuff to tank the hit), pray for max roll sleep time and nuke him.
Lv.150 is recommended for the extra stats.
Good luck to everyone trying to reproduce this run for LG9 =)