Super Castlevania IV Weirdness
Back before Super Castlevania IV was released, a promotional video was made that showed the game in an alpha stage, with stages, enemies and other things not found in the final product. Also note the overenthusiastic announcer ("fight through a ROOM!"). The file is available in Real Video format. Thanks to Lyndon Moore for uncovering and encoding this rare treat.
Castlevania Games - Super Castlevania IV - SCV4 Weirdness