Kirby's Extra Epic Yarn. I only have a few stages (and their medals and collectables) and apartment missions left, already 100%ed the Dedede and Meta Knight mini-games. Not gonna bother with Devilish Mode, that's too much aggravation for a Kirby game even if it will leave the collectables out.
Also hopped on Smash Bros Ultimate quickly to collect the Fatal Fury/KoF Spirits and try out Terry.
Still in Chapter 2 in Dragon Quest IV. I liked this about DQ9 as well, DQ games feel kind of like an anime does, each new town or area gives you a monster-of-the-week to fight and heroically save the day, all while a long-term evil is lurking somewhere.
Fire Emblem: Shadow Dragon is probably going to be next. I've never played a Fire Emblem game fully, just the Awakening Demo on 3DS and I emulated the GBA game a bit once. I did buy the virtual console version, so I am gonna stick through playing it this time.