This is a turn-based strategy/RPG that combines a ton of different and totally unrelated series from all sorts of various Namco and Capcom games, in a similar vein as Super Robot Wars. It lands a spot here because it happens to include a few characters from the Legends series.
The game plays like a standard Super Robot Wars game up until you get into battle, where it shifts to more of a modified Street Fighter engine where only the attacker can move, and the defender has to just stand there and soak it up (or spend for a counter).
Other than this, the game is almost entirely plot.
There’s been no word so far of an English translation of the game, so for now, this page will cover the Japanese game.
Thanks to Haamel for most of the content of this page.