Reaching the endgame in Pokemon Legends: Arceus. Hisuian Avalugg required multiple attempts to take down because one bad dodgeroll can result in getting comboed by his attacks (particularly during final phase).
Then plot stuff happens, I met the Lake Trio Pokemon, but my rotating roster of Pokemon is (mostly) too low-level for the next Trainer battle (whose Pokemon are Lv.60) even though he has some clear type disadvantages I can totally exploit. So the order of the day is level-grinding, then.
On a sidenote, I was hyped to see a trainer's Lucario back at base and the ensuing battle was great (on turn one we both did like 90% damage to each other). New personal objective: catch one for myself. I know where to find an Alpha Lucario at least, but I'm hoping I can also find wild Riolu somewhere. However, this species has a typically low spawn rate and unlike Sword & Shield (or possibly Gen 9) I don't know how this game handles wild Pokemon spawns.