Finally, after years of (a very select few) Megaman fans wondering if Megaman's Soccer really had an ending, after finding the ending music and credits text inside the ROM, after we've all given up hope of seeing the actual ending, comes Kung Fu Furby with a cheat that lets you trigger the ending.
Please note that since the game was coded poorly, there's no official way to trigger the ending. But it was indeed coded in, and use this method found by Kung Fu Furby to see it yourself:
Enter these cheats in your emulator
81829BEE
81829CE0
Turn on the game. Select Tournament, then keep pressing Start to begin the game. You will get the ending instead of the opening.
Unfortunately, the credits (which you can see by opening the ROM in a hex editor) are not found on this ending. I don't know if maybe another game mode gives you the credits or or if there's really no way to trigger it. I'll wait until Kung Fu Furby digs a bit deeper.
Here's a video of the ending:
http://www.youtube.com/watch?v=zeqp3l2QUnI