Super Smash Bros Ultimate,
Pokemon Let’s Go (if not,
sword and shield),
Deltarune (free and a fun rpg game and
the creator has only released the 1st chapter so there is more
action coming soon!) and
Undertale (around $15 and the games
are almost the same concept and made by same creator, but I
recommend playing Undertale first since you will know backstory to
some of the game),
Super Mario Maker 2,
Child of
Light (it’s on Xbox too so... It’s around $15 dollars and it’s
pretty fun, I first played it on Xbox, but not yet on Switch),
Zelda: Breath of the Wild (hours and hours of gameplay,
quests, secrets and more),
Mario Kart 8 Deluxe, and
Super
Mario Odyssey should be some pretty good games.