this is an interesting turn (no pun intended) in the jumping piranha plant. i remember doing an upside-down jumping piranha plant for a non-smwc contest 2 years ago. the downside and side fireballs are quite awesome too.
maybe the rightwards piranha can be fixed by extending the suboffscreen range? (i.e. lda #$03 : %SubOffScreen() ) (and assuming it happens when scrolling to the right, the same could happen to leftwards ones when scrolling to the right?)
Tested with: PIXI 1.2.10 (last one, I promise), LM 3.10, ZMZ 1.08 and SA-1 1.32.
It works, except for the fact the rightwards piranha sometimes does not spawn. A minor reason not enough to warrant a removal, but consider look into it, please, as this sprite of yours is rather ingenious. I seriously liked its implementation.