Rare Replay

I got this achievement in less than 5 minutes with the following method:

* practice mode -- choose Sabrewulf

Stand next to your opponent and rotate the thumbstick while spamming :
*If facing right, rotate clockwise.
*If facing left, rotate counterclockwise.

This cranks out tons of 8, 9, 10, and 11-hit combos. You'll find it works most efficiently when you have your opponent pinned against the edge of the arena.

The easiest way to do this is using 3 special moves in one combo to get a combo of 7 or higher.

Go into Practice Mode with Sabrewulf(or your favourite character). The combo you need to do with Sabrewulf is:
B --> F + MP, QP, B-->f + MP, QP, B-->F + any button
(On the default setup this will be:
, + , , , + , ,, + Any button.)

Repeat that 25 times. It should only take 5 minutes.

For negative votes, please explain why

Go into practice mode and select sabrewulf. The button input using default controls is , + followed by followed by , + followed by . I found it easier to hold slightly longer than a tap and make sure to press the next sequence while the animation for the previous sequence is still happening. Below is a video I made showing what it should look like. If done correctly you will get an 8-hit combo. Repeat 25 times for the achievement.

The most easy way to do this is to do Ultra Combos. I have chosen Jago´s.
The condition for an Ultra Combo is a red glimming life bar and a combo opener. I have chosen Jagos Double Kick as opener.
Legend: FK = Fierce Kick, QK = Quick Kick
The Input for this Kick: +FK
During this Kick you have to input his Ultra Combo. Jagos Ultra Combo has the following Input: + QK
So the full combination = +FK, + QK

Credit to "Weezleram": You can only Ultra someone on their final health bar. In Team Elimination mode, everyone only has one life bar. This means you can Ultra each person on their green life bar once they are low health.

Better yet, you can set the opponent to have 11 characters on their team. You can knock out 25 Ultras in about 5 minutes this way.


Alternative Solution from Bownzinho
D, DF, F = QCF ( , , )

Glacius QCF+MP ,QP, QCF+MP, QP, QCF+MP is a viable alternative. There is nothing wrong with using the Ultras for this as you can use it to knock off that achievement too but there are loads of combos that use the same special three times with autodoubles in between (ex. Sabrewulf B, F+MP,QP) then you will be able to get 4 combos off per round and that is a much quicker and much easier method. You have to do 25 rounds if you only use Ultras, you might as well use combos with those characters during the matches too to get at least 5 per match

You will need two controllers for this solution. I would also recommend going for this AFTER the ultra combo achievement so you will already be partway there.

I found the easiest way to get this was to wait at the title screen until the character bios appear, then enter the code to unlock all options. Go to options and turn on cheap juggling. Now go to arcade mode and press on your second controller. Select sabrewulf for player one and any character for player 2 (I chose orchid). Now spam and after a few attacks the second player will go into the air. Continue to spam and you will juggle ridiculously. When the match is over, press start on the second controller and do it all over again until it pops. You should get this achievement in 10 minutes. Good luck!