Marvel vs. Capcom 3: Fate of Two Worlds

use deadpool ryu and iron man. get 3 bars of special and then hit left trigger for all 3 guys to come out. make sure to do this on an opponent that has full health. should get a easy 100 combo.

For this achievement you'll want to reach an Incredible Combo, or 65-hit combo. This can be achieved by using Iron Man, Modok, and Deadpool. Be sure to set damage on lowest and work to earn your Hyper Combo level 3, then be sure the enemy you use it on has near full health and use your Hyper Combo finisher. You should get a 91-95-hit combo for this 20G achievement.

Also here is a list of all the other combo titles for your convenience:

3 — Yes!
5 — Cool!
7 — Good!
13 — Dude!
17 — Sweet!
21 — Awesome!
26 — Wonderful!
31 — Viewtiful!
37 — Excellent!
43 — Stylish!
50 — Fantastic!
57 — Amazing!
65 — Incredible!
75 — Mighty!
82 — Marvelous!
91 — Uncanny!
101 — Crazy!
111 — Galactic!
201 — Unstoppable!

Separatejoes strat is the one i personally used and it worked well but i found something that if you use just iron man and get 3 hyper guage bars and use his iron avenger move it will easily land you and incredible combo.