Never understood the appeal of that game. It's Super Metroid, only not as good because the weapons are weird.
Hundreds of weapons and items, multiple endings, multiple playable characters, transformations , special moves, items with special moves, an entire extra castle, optional "familiars", bosses bigger than the screen, etc.
Not sure how the weapons are weird, like the rune sword spelling out Verboten? Doesn't sound weirder than Samus rolling up into a ball. I loved Super Metroid so I wont be saying anything bad about it, but I will say I liked SotN better. I still have my original PSX disc. If you think CV peaked at SCV4, you've missed a ton of GREAT CV games especially the trilogy on GBA.
back on topic, chuffed I got Mighty Number Nine for $2.97 . Its worth $3, but its no MegaManX