Normally the game lets you select only certain numbers such as 8, 16, etc. It is possible however to use different ones. I’ve just found this useful addy:

800AAABC

The number of players is loaded there right after you select it. So, if you use this code:

810AAABC 0006

you’ll play a royal rumble match with 6 players

I’ve also tried numbers such as the real royal rumble (30) and 50. I haven’t completed the matches, but they seemed to work fine.

30 players

810AAABC 001E

<50 players

810AAABC 0032

I’ve used higher numbers (70), but the game crashed. I think you can try anything not too high and it should do it. Let me know if this works for you.

Note: the numbers are in the hexadecimal format

– WldFb

Update:

With 60 men it seems to work:

810AAABC 003C

The maximum possible is 67:

810AAABC 0043

– WldFb