Mega Man 4 is a platforming game for the Nintendo Entertainment System.

The game starts with the backstory of the original game as well as this one, which is a nice touch since Mega Man 1 had no such opening story sequence. Just like before, our hero must defeat eight robots, along with the mad scientist who created them...only this time it's apparently a different mad scientist!

As always, when you beat a Robot Master, you gain its weapon. Each Master is weak against one of the others' weapons. Additions from the previous entries are back, like energy tanks, Rush the robo-dog, and the ability to slide.

A welcome new feature is the ability to charge your main weapon, which gives you a slight edge if you haven't yet obtained a particular boss's weakness. There are two new support items: the balloon and the wire. The balloon lets you create floating platforms to jump onto (just like Item 1 in Mega Man 2) and the wire latches onto the ceiling and pulls you upward. They seem a little unnecessary since Rush is still present, but they give you more options to tackle any situation.

A password system is an added feature and lets you continue after defeating the 8 Robot Masters.

This is a MegaMan/Rockman patcher/randomizer to modify the major boss-related RNG. This could be used to make for better head-to-head races. The mod specifically allows customization/removal of the following:

- Drill man: drill events, including the initial one
- Dust man: suck events
- Skull man: skull shield delay
- Square machine: 1/2/3-pass
- Met Man: open/close durations
- Tako Trash: Fireball/bomb attack
- Dr. Wily: Spawn location customization (by row); duration of hitbox and respawn delay

You can fully customize to your liking or generate randomized/blind ROMs:

https://jeboo.github.io/mm4_derng/

The readme has the code and brief descriptions of the RNG for those interested.
The title screen has been modified (replaced 'WORD') to show the patch/version.

The included patch gives the easiest options possible for all bosses. Please note MegaMan and Rockman require unique patches due to slight differences.

Database match: Mega Man 4 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 2AE9A049DAFC8C7577584B4B9256F7EF8932B29C
File CRC32: ADBD4E48
ROM SHA-1: 673A888C468ABE33FB0B3F063C6837DD21D5D32B
ROM CRC32: 2BC67AA8

Database match: Rockman 4 - Aratanaru Yabou!! (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: C33C6FA5B0A5B010AF6B38CBD22252A595500A5A
File CRC32: 771A9138
ROM SHA-1: 83F5EA60D6E6489EC0E5AF4B938D2D1C8FD24DD5
ROM CRC32: F161A5D8