The existing guides for this achievement and are excellent. This is just a corollary. I will point out what I think are the most important things in acquiring this achievement. I found these missions much, much harder than MvC 3 (Vanilla). They’re longer, timings are stricter, some combos require you to do things that are not clearly mentioned in the notation, plus you have to complete so many missions (480 versus 320 in Vanilla)…
Byakokoko has OUTSTANDING videos which walk you through 17 different characters. He pauses mid-combo, and has text annotations explaining what to do. Very helpful. Thanks to that channel, I was able to finish several tough(er) characters. **I have linked Strider Hiryu's mission mode at the bottom, follow his channel to get the rest of the characters.** There are also excellent text-based guides on the x360a and PS3 trophies pages.http://www.ps3trophies.org/forum/ultimate-marvel-vs-capcom-3...http://www.xbox360achievements.org/forum/showthread.php?t=34...
Vesper Arcade’s Youtube videos are great; this alone wasn’t enough to get me to 480. They’re excellent for observing timings and execution of missions, but they don’t explain things in-depth.
*Something that really helped me was viewing missions on Infinite Looper http://www.infinitelooper.com/
While this may seem odd or redundant, it is a good thing for setting a mission mode video at the exact point that you want/need to see. Not to mention, it saved me a lot of time by not having to click back and forth through the segments of a video on Youtube. Take the videos from Youtube and paste the link into the Infinite Looper website. You can then set the video to begin/end at points of your choosing.
1) Do NOT button mash:
Many people start out this way, myself included. Force yourself to break the habit. More often than not, it does more harm than good, as far as making combos whiff. Aside from (the few) combos/moves that require mashing, e.g., Dante 9/10, Vergil 10, it is not advised.
2) Controller or Fight Pad:
There seems to be a big misunderstanding on this issue. Personally, I used a combination of a 360 controller and a Mad Catz Tournament edition fight stick to complete 480 missions. 60% stick, 40% controller... Missions can be done with either or both. If you don't own a stick, don't think you have to buy one to hit the 480 mark. I will say that I found some things easier on a controller and some on a stick. Per example, Viewtiful Joe 8 and 10 took me two hours of practice on a stick. I switched to my controller and got them easily. Modok 10 was tough on a controller, and easier with a stick. In the end, it comes down to preference and practice.
3) Jill and Shuma-Gorath:
Buying these two will allow you to skip twenty tough missions. Not only have these two DLC characters gone on sale a few times, they will save you hours upon hours. They’re well worth the cash. I can not fathom having to do Sentinel 10, X-23 9 and 10, amongst others. I was able to skip over them.
4) Looking at the combo bar, as opposed to my character actually helped me on some missions. It will give you a sense of appropriate timing. Having said that, it’s important to note that different characters operate at different speeds. You need to adjust your combo execution accordingly.
5) Similarly, some missions will require you to input a command without being able to wait for a visual cue. Strider’s 9 is a good example. After the Formation B, you need to follow through with the Standing H and the Gram L right away. You cannot wait to see the formation B. Acclimatize yourself to this concept, as it does occur on a few missions.
6) These are the combos that I skipped: Morrigan 10, Dante 10, Chun-Li 10, C. Viper 10, Akuma 10, Jill 10, Strider Hiryu 10, Firebrand 10, Captain America 10, Deadpool 10, Doctor Doom 10, Super-Skrull 10, X-23 9 and 10, Modok 9, Phoenix 10, Magneto 9, Taskmaster 10, Sentinel 10, Shuma-Gorath 10... Almost all of these combos (save Dante and Taskmaster), have very tricky inputs and/or timings (in my personal experience). I would say this is a good rubric on which combos to skip, but as 'IHeartParamore' pointed out, everyone has their strengths and weaknesses. Find what suits your play style.
7) My pick of the easiest/hardest characters (from the ones I attempted):
*EASIEST: Nemesis T-Type, Ghost Rider, Dr. Strange, Zero, Tron, Hsien-Ko Iron Man
(#8 has a tricky air juggle, the rest is easy), Nova
(#8 has two tight links: After the last Centurion Rush H, remember that it's a two-hit attack. Input the Air H right after he hits with the second attack. Following that, You need to input the Air Super Nova VERY quickly, or the combo will reset.)
(irregular moves and some things have to be inputted when you can't see your character, i.e., after a hyper animation), Spider-Man
(8, 9 and 10 have sections with tight timings. I will admit: I TOTALLY lucked out on 10. It worked after a few attempts. Overall, I would advise skipping this one), Strider Hiryu
(Tight timings), Rocket Raccoon
9 and 10 (similar to She-hulk, you have to input a dash command after recovering from his hyper combo. The Oil Bomb also has a tight timing window), Viewtiful Joe
(8 and 10 took me forever). I think Joe's are the hardest of the ones I tried. The problem is that you can not buffer attacks with him--the same as Chun-Li. You need to hit the Air M Red Hot Kick right on time, and IMMEDIATELY cancel into the Air H Red Hot Kick).
Pay very close attention to the timing of the ultimate attacks and the X-Factor at the end of the combo. C. Viper
(8). The Air Dash proves annoying. After you get the timing down, the three attacks at the end of the combo require very precise timing.
The rest of the missions fell somewhere between easy and hard for me. If it's a character's combo(s) that other people skipped on their respective guides, e.g., Sentinel 10, X-23 9 and 10, Captain America 10, Super-Skrull 10 and so on, it's probably for a good reason. Look into this and decide where you want to skip and where you want to strive to finish a mission. Also, as mentioned by others, there are a few tricks that can make otherwise difficult missions easier. Phoenix Wright's 9, Iron Fist 10, Amaterasu 9 and 10 are just a few that come to mind, regarding tricks to lessen the load. Details are on the x360a Mission Mode thread linked above.
Lastly, keep at it. Do a little each night. Once I cleared 8 missions with everyone, my goal was to complete 2-3 missions a night. Some nights I did more, some less. Pace yourself. Use the online resources and study difficult combos in-depth.