I understood how the first trial works, you need a pokemon with more than 135 attack bases that can learn rock smash (done with conkel)
Second trial, i finished first place with magcargo level 38 with armormagma
This year's event was good. The only negative point for me is that the maps are too big. To go from point A to point B, sometimes it's too far. Or maybe it's me who is too lazy