You have the right number, but there's no sprite for Oshawott currently in my patch. The Wormadam sprite is a placeholder.
Yes, you check both of those, and the error is most likely caused by a change I made to the spriting system in the patch. If you could tell me what the error is, I could be more helpful.
Signature cannot exceed 1mb, and breaks the height/width rules. Check the signature rules thread.
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