 If you liked
Bleach Movie 1: Memories of Nobody
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 ...then you might like
Suzumiya Haruhi no Shoushitsu
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I don't know how many people will agree with me here, but here I go
These two movies really gave off a similar feeling while watching them and after finishing them. They both involve, people losing memories, and they both involve an energetic female lead.
To watch both of these you would have had to have seen a large portion of the show they're attached to.