Rip Van Fish

From SMWiki

Active Rip Van Fish chasing Mario.

Rip Van Fish is an underwater enemy that is always seen sleeping until Mario gets close to it, at which point it will wake up and begin to angrily chase him. Rip Van Fish can also wake up from a Chargin' Chuck's whistle.

Hacking Information

RVF is sprite 3D.
It uses palette B.
It requires you to either use the Water tileset or set SP4 to GFX06.
Its tiles are in a 32×32 block with the top left corner at $0C.
The Z's are stored in a 16×16 block with the top left corner at $60.
For best results, you need sprite buoyancy active. Otherwise, it'll just swim along the ground!
RVF's can be used outside of water. Again, they'll just swim along the ground until they hit water.
If you use RVF's with a Layer 3 tide or with water tiles, they won't jump out of the water if they hit the top. They also don't go through walls. But if you use upside-down or sideways water in your hack, they'll fall out.
Eventually, an RVF will stop chasing you and go back to sleep. But if a Whistling Chuck wakes them up, they will permanently stay awake. Even RVF's that you encounter later on in the level will be stuck in "awake" mode. The only way to reset this is to leave the level via exit-enabled objects.