List of Nintendo DS games with Game Boy Advance connectivity
From Sega Retro
Between the years 2004 and 2006, Sega published Nintendo DS games with features that can only be unlocked if a compartible Game Boy Advance game is inserted into the GBA slot of the system (making impossible to do that in the DSi, DSi XL, DSi LL or any 3DS system due of fact that they lack this slot).
Unlocks the Puyo Wig in Maniac Mode. (Puyo Pop)
Unlocks the Sonic Wig. (Sonic Advance, Sonic Advance 2)
Unlocks the Chao Wig. (Sonic Advance 3)
Unlocks the Ulala Wig. (Sonic Battle and Space Channel 5: Ulala's Cosmic Attack)
Unlocks the NiGHTS Wig. (Sonic Pinball Party, ChuChu Rocket)
Unlocks the "Fist Gloves". (ChuChu Rocket)
Unlocks the "White Gloves". (Puyo Pop)
Unlocks the "Pink Glittery Gloves". (Sonic Advance, Sonic Advance 2)
Unlocks the "Hand Puppets". (Sonic Advance 3)
Unlocks "Amy Rose's boxing Gloves". (Sonic Battle)
Consequence: Unlocks a bonus of 500000 points for Urahara shop. (Japanese version only)
Consequence: Transfer the cards from the GBA game to the DS game.