What is your favourite GBA/GBC game?

I am literally playing this little game called Shaman King: Master of Spirits since yesterday and having a blast. I try to get used to a smaller screen for when my Anbernic (I play on Delta on my iPhone in the ss) will arrive and I got a lot of fun and eye-catching GBA and GBC games to play.

I was wondering: What is your current favourite/ all time favourite GBA/GBC game that you remember playing non stop? I definitely want to try new stuff!😍