Dragon Ball: Raging Blast 2

Edit: You can do this in player matches with a friend, figured I'd add this since I saw someone comment asking if it had to be ranked.

Boosting this is pretty much required because it seems like anyone who plays this online will use the cheapest tactics imaginable. The quickest way I found to do this is to have the loser equip the Super Health Power Down item, and the person who will be winning equips the Super Attack Up S, M, L and either High-Tension start or Battle Drive. The characters I would suggest using for this are Vegeta or Goku, because one of them will be the character your cursor is on. I used the Super Saiyan 2 version of Vegeta and the Super Saiyan 3 version of Goku, because their default RS-Up attacks (Big Bang Attack and Super Kamehameha) are quick to do their full damage and do not require charging. With all the Super attack power ups equipped you will do over 10k damage to the other person, which will be enough to kill them due to them only having 1 bar of health with the Super Health Power Down. Just keep repeating until the achievement is yours.

IMPORTANT NOTE: You may want to back out to the main screen every so often, the first one you go to after the title screen. This is so that the game will save your progress, because while going for this achievement both my friend and I had our Xboxs lock up while starting up a fight, and this was not the first time this had happened to me while playing this game, and because of it the progress we had made since the last time it saved was lost.

easiest way is to boost with a friend each getting this and the 50 battles achievement.(take turns winning or doing 30 wins each consectutive) takes about 30 min use a suicide character for the loser like choaisu or saibamen