Strike (00/World) - SD Gundam G Generation Cross Rays OST

In-game name: "Strike" Formerly the Celestial Being theme for 2nd Season units in World and Overworld, now it's just used as event BGM. 00 Gundam took its place, but Cross Rays has SRW-styled selectable music now, so this song being in the game is enough. EDIT: Small correction, Marina uses this theme by default if you scout her (haven't checked Saji yet as I haven't done his quest).