You can change the arena, presumably for any match you'd like to set up. This will allow you to play in any arena you choose including performance Center
darkened arena, 2k arena, white background, dark white background, black backstage, hall backstage, normal backstage, free roam area, white screen test, nxt lighting test, and no lighting test. The process is simple.
1- attach cheatengine
2- set up a match, at fighter select screen select match options, and change arena
3- read the arena value at 0012D020 or 0012D060
4- scan for the value found there
5- change the arena again
6- scan for the new arena value (value at 0012D020 or 0012D060)
7- from the now short list select the address xxxx0720 and change it as desired, this is the arena that will load
Also if you'll be doing this more than once before exiting the game, take the address xxxx81B0 from step 7 and use it's value for the first scan at the fighter select screen. The advantage is that you can run the first scan without changing the arena, so you only need to change it once on subsequent arena changes in order to find the xxxx0720 address.
the following are values for some unlisted arenas that are loadable and playable, there may be others, there likely will be glitches.
70- Performance Center
72- darkened arena
95- 2k arena
82- white background
25- dark white background
66- black backstage
67- hall backstage
78- normal backstage
83- free roam area
91- white screen test
92- nxt lighting test
93- no lighting test
96- great balls of fire