This trick requires two controllers. Use the following trick to get all the vs. mode unlockables quickly. At the level selection screen, press Y and the options should appear. Select "Sniper Showdown". Then where it reads "Point" change it to "Survivor". Next, set the number of lives to "1" and select "OK". Once back at the level selection screen, choose "Simple Map 1". You should start very close to your opponent. Shoot them and they should die in one hit. Once it is over, just select "Retry". Keep doing this until you unlock the desired bonus. When you unlock "Sure-Shot Scuffle Mode" at fifty matches, you can accumulate matches even faster because you can kill your opponent in one hit with any weapon.