Download Seneca's Adventure Part One This is an ips file you need an ips patcher and a copy of the Mario 1 rom with the title screen.

Seneca's Adventure Part Two

Download .IPS File that makes Zelda playable and adds new boss in level 7
This is a patch for BS Zelda.

 BS Zelda hack I made to see what Ganon and Zelda would look like in the game.

Mario 1 Hack

Mario 3 Hack