Marvel vs. Capcom 2: New Age of Heroes
Marvel vs. Capcom 2: New Age of Heroes
According to the game's director Tatsuya Nakae in a 2000 Arcadia magazine #3 developer interview, he was asked if he could comment about the three new original characters: SonSon, Amingo and Ruby Heart in the game. Nakae stated that until now, Norimaro had been the only original character in Marvel vs. Capcom series, so he wanted to add more new characters in the game from the start. When Nakae asked the game's lead character designer Katsuhiro Eguchi for some designs, Eguchi told Nakae that he wanted to revive someone from a classic game and sent him a design that reinterpreted SonSon as a girl; Nakae stated "it was interesting and had a lot of impact" and put the character in the game.

Nakae then stated that Amingo was designed to fulfill the missing role of a non-human Capcom character that was "capable of really crazy movements", and that Ruby Heart was designed to be the leading character of the three newcomers (in a marquee role similar to Ryu and Cyclops) and as a new challenge to create a "cool, female character", the kind of which had not commonly taken center stage in games released at the time.
Contributed by ProtoSnake
According to game's director Tatsuya Nakae in a 2000 Arcadia magazine #3 developer interview, he was asked how they were able to realize the support for the game's online matching service network (established in collaboration with Japanese telecom KDDI). He responded:

"In the beginning, Funamizu asked us if it’d be possible to add online battles as a major selling point, and after discussing it internally and determining that it might be feasible, we decided to approach KDDI with the idea. Thankfully, KDDI was on board and got to work on making it a reality; we didn’t have a ton of time for development, but thanks to the hard work of KDDI, we were able to make it happen."
"At first, I was worried about lag during online matches, but when we ran in-house tests, the lag didn’t feel as bad as I feared it would and we were able to comfortably play online, so we rushed to finish the game. People who’ve never tried it tend to think “online play, I don’t know…” and shy away from it, but those people are the ones who are the most impressed when they finally try it for themselves, so I’d really urge you to go hands-on for yourselves."
Contributed by ProtoSnake
According to the game's director Tatsuya Nakae in a 2000 Arcadia magazine #3 developer interview, he was asked why the team included two Wolverines in the game, one with bone claws and the other with adamantium claws. He commented that the team wanted to focus on the bone claw Wolverine, but the directive from Marvel was that both had to be included in the game. This made it difficult for the team to differentiate the two characters as they look almost identical, so they had to think of where and how to add pronounced, yet subtle differences.
Contributed by ProtoSnake
According to game's director Tatsuya Nakae in a 2000 Arcadia magazine #3 developer interview, he was asked how Cable and Marrow were selected for this game? He responded:

"One of the staffers at our company is extremely well-versed in American comics, so we asked him to come up with a list of candidates. Using the selection criteria of “attacks that can be easily understood at a glance” and “doesn’t significantly overlap with any of the characters introduced with the previous games”, as well as “cool factor”, we narrowed the selection down to those two."

"With regards to Cable in particular, we also factored in his slightly convoluted backstory as Cyclops’ son from the future as something that players would find fun."
Contributed by ProtoSnake
According to the game's producer Yoshihiro Sudo in a 2000 Arcadia magazine #3 developer interview, he acknowledged that the line charge for the arcade release of the game in Japan charging 13 yen per minute, meaning 50-60 yen per game, was a controversially high rate that the developers did not want to increase and that fans complained about for being too high, but that it was the lowest possible price they could charge the game at for the time being. He then expressed hope that the cost would lower as more people played the game.
Contributed by ProtoSnake
When Jill Valentine removes her beret, it is shown that she has long hair tied in a ponytail underneath her beret to appear short.

This is inconsistent with the in-game portrayal and artwork of Jill in Resident Evil 1 (which her appearance is based off of), where she just has short hair. However, it does falls in line with the live-action portrayal of Jill in Resident Evil 1, as the actress who portrayed her also had short hair tied in a ponytail under the beret.
Contributed by Takahashi2212
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Ruby Heart was going to get her own game in 2014 for mobile phones called Dai Koukai Frontier ("Great Voyage Frontier"), but the game has been indefinitely postponed.
Contributed by Mass Distraction
In the Japanese version of the game "Air Combos" are referred to as "Aerial Raves". There is a sound file in the international versions of the game of the announcer saying "Aerial Rave!", which goes unused due to the change.
Contributed by Takahashi2212
The Japanese Dreamcast version of the game featured an online mode, allowing players to fight each other via the Dreamcast's modem or broadband adapter. This mode was removed from the international release for unknown reasons, with the game's logo taking it's place on the menu. The music associated with the mode is still in the files of the PAL and US release, but goes unused.
Contributed by Takahashi2212
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The character of SonSon is in fact the granddaughter of the protagonist from Capcom's Arcade game, SonSon.
Contributed by Mass Distraction
If you kill the final character of a team with Dan's Premium Sign attack as it's thrown, it will count as a Hyper Combo Finish.
Contributed by Takahashi2212
According to Yoshinori Ono, the character Ruby Heart started out as a character of the Darkstalkers series before being rejected and moved over to Marvel vs Capcom.
Contributed by gamemaster1991