Recently I discovered that people have actually started working on Mushroom Kingdom Fusion again, after it was in hiatus for a long time. It used to be maybe my favourite fangame ever, combining all kinds of different franchises while still keeping the Super Mario Bros 3 / Super Mario World style gameplay.
The game still isn't finished but I'm surprised they're working on it at all.
Levels included in this video:
00:00 Intro
00:22 6-9 Oedo Castle
14:29 Final Fantasy 6 Battle
15:48 6-BOSS Dracula's Castle (Entrance)
25:30 6-BOSS Dracula's Castle (Underground Cavern)
31:45 6-BOSS Dracula's Castle (Colosseum, Devil boss fight)
44:20 6-BOSS Dracula's Castle (Hanging Gardens)
49:31 6-BOSS Dracula's Castle (Clock Tower)
52:36 6-BOSS Dracula's Castle (Dracula + Death boss fight)