How do you fuse in Dragon Ball raging blast

Its simple for the ps3 just hold r2 and a pallete will come up then you press one of the buttons deppensing on who on the pallete you chose to fuse into XBox 360 you need too be in a team battle chouse the 2 people u want to fuse with like trunks and goten u play as 1 and charge your ki past 1 bar then hit RT then hit Gotenks face and GOTENKS!