OH, FOR THE LOVE OF CRAP.
Let me explain:
In the Arcade version of UMK3, there is no Noob Saibot or Rain. They are non-playable characters. Rain isn't even in the Arcade version. He only shows up on the Attract Screen. (The screen that stays on the screen until someone inserts a credit.) The 360 has the Arcade version of UMK3. Rain and Noob Saibot was put on the SNES and Genesis version of UMK3 so that they'd be a reason to buy that instead of getting Trilogy, which was only on N64 and PS1, like 9.95 said.
So, seriously, turn off the caps lock and get over the fact that you can't get Noob Saibot and Rain on the 360.
Let me explain:
In the Arcade version of UMK3, there is no Noob Saibot or Rain. They are non-playable characters. Rain isn't even in the Arcade version. He only shows up on the Attract Screen. (The screen that stays on the screen until someone inserts a credit.) The 360 has the Arcade version of UMK3. Rain and Noob Saibot was put on the SNES and Genesis version of UMK3 so that they'd be a reason to buy that instead of getting Trilogy, which was only on N64 and PS1, like 9.95 said.
So, seriously, turn off the caps lock and get over the fact that you can't get Noob Saibot and Rain on the 360.