I had been looking for some carts for the N64 but couldn't find them without watermarks or something else so I have created some here I hope will be of some use to people.
Carts so far include:
Choro Q 64 2_ Hachamecha Grand Prix Race
Dance Dance Revolution_ Disney Dancing Museum
Densha de Go! 64
Doubutsu no Mori
Dragon Sword 64-01.png
Eikou no Saint Andrews
Fushigi no Dungeon_ Fuurai no Shiren 2 - Oni Shuurai! Shiren Jou!
Glover 2 (this is an Edit of something I found online)
Neon Genesis Evangelion
Power League 64
Puyo Puyo 4_ Puyo Puyon Party
Puyo Puyo Sun 64
Super B-Daman_ Battle Pheonix 64
Super Robot Wars 64