You need to find the three dealers that sell the "Jetparts" "Boardparts" and "Wingparts". One is in the lower level of town area 2 hidden by a path by the upper left corner of the square. One is in the lower area of town area 3 that you can only get to through the park area. And the last one is in Yumland area, down a side road, covered by the raised path in Yumland area. Once you have the parts, go to Netfrica area and find the entrance to the undernet. Once you are by the C-slider path, talk to the navi who is there. You don't have to pay attention to what he says. After he's done talking, go to the Sharo area, find the door that requires a toll to get through, pay the toll, and go through. Talk to the navi in the area beyond, and she will put together the three parts into the C-slider. An extra hint: the purple crystal next to the navi contains the battlechip "Blkbomb," which you need for the quest before facing Coldman in the Red Sun Tournament.
you buy it
currently there isn't any info about Megaman Starforce 4 , but there will be a crossover game with Megaman Starforce and Megaman Battle Network for the DS
6 versions: MMBN, MMBN2, MMBN3 Blue and White (Japanese Black), MMBN4 Redsun and Bluemoon, MMBN5 Team Colonel and Team Protoman (DoubleTeam for DS), MMBN6 Cybeast Gregar and Cybeast Falzar.
there is talk of a new megaman for 3ds
no you cant
no you can only link megaman games together if it is the same number like megaman battle network 3 blue to megaman battle network 3 white
most likely not but i hope they make one "Megaman EXE Operate Shooting star" is coming out which is a cross between the original megaman and megaman starforce.
probably not but i hope they make one Edit by Luis: There's going to be "Megaman EXE Operate Shooting star" which will be a cross between the original megaman and megaman starforce.
its not coming for usa for now but i tink it wil come in 2011 "Megaman EXE Operate Shooting star" is coming out which is a cross between the original megaman and megaman starforce.
people with heads
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.
I highly doubt it sorry :(.