>>11912974
>Drill Dozer, Boktai
You can download the rest, but please play these on actual cartridges because rumble and light sensor.
>Bit Generations
A series of cool games which barely got any buzz. I like the racing one.
>Castlevania x3
Play in release order. If you have already played the DS ones, CotM will feel weird but it actually owns.
>Chu Chu Rocket!
Best puzzle game. You can also try "Mario vs Donkey Kong" which could've been any characters but is a fun game.
>Kuru Kuru Kururin
Classic very Japanese set of games. Also has a GameCube one.
>Golden Sun
Beautiful RPG. Has two games, which you can link up to sorta continue when you finish the first. Some whiners complain about dialogue, but I rave about the Lufia-like puzzles and personally enjoy story. Also love the battles more than any RPG.
>Mega Man Battle Network
Has 6 freakin games. It ain't Megaman; it's a new genre of game. You explore pretty old school feeling digital 'dungeons', and get into random encounters. But the battles are very unique and in real time, using a deck of cards you choose. Give the first one a shot!
>Mega Man Zero
Four games! Tough as nails, cool upgrade mechanisms.
>Harvest Moon
These are the reason Harvest Moon survived into the modern era. Friends of Mineral Town revived the series, in my mind.
>Advance Wars
Fire Emblem except better, part of a long-running JP series. Sucks they didn't keep localizing the games after.
>Riviera, Sigma Star Saga, Yggdra Union
I own these, but have not played. They are sposta be pretty rad.
My go-to recommendation source, probably where I heard about all this. Also has other lists around their site:
https://racketboy.com/retro/best-undiscovered-nintendo-game-boy-advance-gba-games
4ch mirror of an older wiki some people like, though I never found it useful:
https://vsrecommendedgames.miraheze.org/wiki/Game_Boy_Advance
There are also translations of various JP-only games to explore.