The final boss of Megaman Battle Network 4 is Duo. It does not matter which version you have. However, after defeating Duo, there are optional bosses.
If you mean hate, then I can explain why. People hate Megaman Battle Network 4 because in order to beat the game, you have to start a new game (a harder level) to get souls and chips you need. That is very annoying and it's just terrible. Chips, libraries, and other important things aren't lost when you start a new one, but you have to battle the boss and final boss 3 times is very just horrible. So, some people just skip that game and some don't. Even if it's bad, it's still a Megaman Battle Network game.
Palmer is the final boss....... but it depends in where you started at........
The final boss that you play against is Ansem.
Final Fantasy VI's boss theme is called Decisive Battle.
Cyber Beast Gregar is in the Copybot Comp. The Copybot Comp is the last stage of the game. After you beat all the other bosses in the Pavilion, you have to battle Gregar. Gregar is the final boss.
Corvus
You can either fight Omega in the game (He's the final boss) or look it up on youtube. the song's called cannonball and it's by the Mythos.
get the 7 chaos emeralds
The Song Is: Pokemon Battle Revolution Final Boss Music If You want to Download The Music Here it is: http://www.sendspace.com/file/wp6xnr
You need the gigantic blue ones. You know the ones with the nunchuks and kunai and shurikens. But don't use the red ones, they are not that bright. But once you get past the boss you should get rid of the ninja because they will turn on you later on.
Taurus fire
you shoot ur epic cannon blaster and love kick it till it dies then u get the key to happiness and smash ur game boi