Best GBA game you've played

There was this game, like turn based RTS, maybe was called Advance War or something like that. Was pretty good, spent lots of hours on that.

man back in the day for me it was The megaman battle networks series, Advanced wars series, Super robot wars series and my all time favorite Golden sun and Golden Sun teh lost age

I still play GBA games with an emulator on my phone regularly (hella fun). I suck at choosing bests so here's all of mah favs in no particular order, except for the bolded ones, those are top tier.

Mario games obviously
Pokemon 3rd Gen (still best gen) and 1st gen remakes
Golden Sun
Advance Wars
Fire Emblem: The Sacred Stones (and others)
Final Fantasy Tactics (and every FF port, 4 especially)
Kingdom Hearts: Chain of Memories
Megaman (All of them, including Battle Network are fucking fabulous)
Metroid Fusion & Zero Mission
Castlevania: Aria of Sorrow, Circle of the Moon, Harmony of Dissonance
Warioware
Tactics Ogre: The Knights of Lodis
Harvest Moon: Friends of Mineral Town
Doom
Legend of Zelda: The Minish Cap (and every LoZ port)
Sonic Advance (memorably the last good sonic game I played, sad)
Astro Boy: The Omega Factor (Treasure + Hitmaker = TAKE MY MONEY)
Yu-Gi-Oh GX: Duel Academy
Kirby: Nightmare in Dream Land
Grand Theft Auto Advance
Metal Slug Advance
Donkey Kong Country
Mario Kart
Namco Museum (Bunch of Namco games in one ROM? yes pls)
Drill Dozer (First game I played by Game Freak that wasn't Pokemon, pretty damn good)
Yggdra Union

ghost babel if it counts

I'd have to say Megaman Battle Network 3. The rest were also really good (although 5 was my least favorite) but 3 was my favorite in terms of gameplay. Megaman Zero and Metroid Fusion were also really good (I guess I just really like games with the letter M).


edit: How could I forget Harvest Moon: Friends of Mineral Town? Elli best girl.