This patch replaces the Metroid NES RNG with the FDS (Famicom Disk System) RNG.
This restores the original enemy behavior from the FDS version of Metroid.
Apply "Metroid FDS RNG.ips" to "Metroid (U) (PRG0) [!].nes" (MD5 of d77c8053168da14b360bf5caeccc5964)

Also included a patch for the expanded Metroid ROM using Ediroid.

- drk421 (drk421@gmail.com)