First things first, is it invisible in Lunar Magic, or only in-game? If it's invisible in LM, it's probably a graphics thing; make sure you have the correct graphics files for the Ninji in either
(sprite GFX set 0E) or
(set SP4 to 0E).
If it's only in-game, then it's probably a sprite limit issue or OAM conflict. If you can still actually interact with the sprite as if it's there, that'd indicate an OAM conflict; you can try fixing that with this patch
and setting the sprite memory setting (under
) to 08.
Otherwise, it's probably a sprite limit issue, in which case you just have too many sprites spawned at the same time for a new one to spawn.
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