Already tried to kill Lele with xurkitree, nothing.
Also tried to lvl up a tier 3 charm to lvl 3 on dugtrio, nothing.
An additional secret for me is the woobat card. Probably obtainable from some NPC.
Me and my friends tried:
#412:
-evolve alolan dugtrio at the lvl 100;
-die from underground;
-kill dugtrio by alolan dugtrio and vice versa;
-kill electrode by dugtrio/alolan dugtrio;
-kill pikachu by dugtrio/alolan dugtrio;
-kill dugtrio/alolan dugtrio by slaking;
-kill dugtrio/alolan dugtrio by glalie;
-kill dugtrio/alolan dugtrio by dewpider;
-use telekinesis on alolan dugtrio;
-change nick alolan dugtrio;
-change color ball alolan dugtrio (kurt);
-catch alolan diglett in any kind of ball;
I found four players who have progress (forgive me for writing about you personally): Clen Marudel, Stephen Curry, Ash Ketpshups and Tsugekai.