1.what is "two-player bomb control"?No one knows.
2.Has it been released?just i thought all servers had same version now...Yes, all servers have the same version (except for details like the item names in the fridge). But there is still an item that has not been found yet

And a key which no one knows more about...
3.if we do know what it is,how is it achieved?Well... We do not know
4.also, whatis the special soccerfest mode i think i've heard about?Get

at the end of PD 51; then you will unlock "advanced ball control" mode for Soccerfest. With this mode you can kick the ball farther if you are running at the same time. Nothing too special, just a small add-on
