For RPGs, you've got Golden Sun 1, Golden Sun 2, Final Fantasy Tactics Advance, Final Fantasy 1 & 2 (they come on the same cart), Mario and Luigi: Superstar Saga, Breath of Fire, Breath of Fire II, Lunar Legends, Pokémon Red/Blue/Silver/Gold/Crystal/Ruby/Sapphire/Fire Red/Leaf Green (Emerald's coming soon), MegaMan Battle Network 1/2/3 Blue/3 White/4 Blue/4 Red Sun (5 is coming soon too), Lufia, Sword of Mana, Kingdom Hearts: Chain of Memories, Classic NES Series: Zelda II, Zoids: Legacy, Dragon Ball Z: Legacy of Goku 2, Dragon Ball Z: Legacy of Goku, Dragon Ball: The Red Ribbon, Dragon Ball Z: Buu's Fury, Lord of the Rings: The Third Age, Baldur's Gate: Dark Alliance, Bomberman Jetters, Car Battler Joe, CIMA: The Enemy, DemiKids: Dark/Light, Demon Hunter, Dokapon, Dragon Quest Monsters: Caravan, Dungeons and Dragons, Fire Emblem 2, Gyakuten Saiban 3, Hamaro: Rainbow Rescue, Harvest Moon: Friends of Mineral Town, The Lord of the Rings: The Fellowship of the Ring, The Lord of the Rings: Return of the King, Monster Guardians, Monster Rancher Advance, Monster Rancher Advance 2, Mother 1+2...I could go on, but I think you can find more than four games somewhere in there.