Pikmin 1&2, TTYD, Luigi's Mansion, Sunshine, Wario World, Air Ride, a number of great games. I was that kid that played Melee and Mario Party alone just messing around with the singleplayer content and extra modes and stuff. Me mum would play Double Dash with me in the back where my controller may or may not have been plugged in, pretty sure we unlocked everything once or twice. Good times, good memories.