MUA1 had 25 without DLC
If it's about primary gameplay versions:
* MUA1 (Primary ver.: Ravensoft) had 23 Base without former system exclusives, excluding from GBA due to completely different gameplay
** 7th-Gen (who were supposed to be part of Base in 6th-Gen & OR PC as well)
** PSP (who were supposed to be part of Wii as well; Hawkeye character became part of 360 DLC/GE, but not his simulation)
** 360 DLC/GE (this includes upgraded Hawkeye; but not his simulation, including Hulk's unused files (special dialogues, NPC, loading screen (Classic Green & Original Grey) & simulations) are being forgotten, not to mention Venom's loading screen too)
** Totalling 36 rosters. 2016 Re-Release could have the PSP exclusives (as I said before, Hawk's character gameplay based on his upgraded GE counterpart) uses the files ported from Wii ver. aside Gold Edition's 33 rosters, in addition of fixing everything that was left behind on GE Patch (think Dr. Doom's special dialogue w/ Ymir "bug"), including re-used some cut contents
* MUA2 still safe & have no forgotten contents within primary gameplay ver. (VVisions), as n-space versions (PS2/PSP/Wii & DS) are completely different in both content & gameplay features alike Though there are some unused cut contents within one of each 3 versions (n-space had 2 as mentioned before)