I suppose you didn't know that you don't need the items you get by using the destruction speheres to get Anima, as long as you've used the destruction spheres to get them. Get what I mean?
You have to have used all the destruction spheres from all the temples (except Remiem temple and Yojimbo's) in order to unlock Anima.
The Onion Knight is easy, as long as you have the celestial mirror (which I am going to take for granted that you do). You go the the Baaj Temple, jump into the water from that bridge you land at, and go to the bottom of the map and Lulu's weapon should be somewhere behind a fallen pillar or something. The camera angle makes it kinda difficult, but it's there just keep pressing (x) around that bottom part if you can't find it.
The Venus crest is, well...I forget.
