Finally, a HP bar, which is level specific. Meaning, I can turn it on in Boss battles, while it's off in normal levels.
Hit (Toad is invisible though, lol)
I might make a vertical one like in MegaMan, but I'm not too sure yet.
EDIT: Small update on my HDMA kit.
Since I'm too lazy (and also lack of knowledge for sprite hacking) I just picked the code from d4s' HDMA kit to fix the priority for some sprites. There are only 1-2 minor problems I've noticed though. The piranha's color is slightly affected by the color gradients, if they're in front of everything i.e. fog, water, lava, desert effect or whatever color you want. Normal background color gradients work fine though. Also, net climing Koopas disappear behind the background, once they're behind the net. Same applies to Mario and other sprites, which status is set to go behind the FG. Just try to avoid either the net climbing in HDMA levels or HDMA in net climbing levels.
I already made a patch for it, once I release the HDMA kit, but I'm not really sure, if it works on already hacked ROMs, since it uses d4s' offsets. If you got space in the range of x87000 - x98400 it's probably save to say, that it works with your hack, otherwise you'd have to copy everything over, but this is a one time only. After that you can edit the ROM as much as you want.