It can't be done.
The 3/4 players are no longer working in toribash since at least version 3.7

im have toribash 3.88

the old one doesnt work but can anyone make one for v3.88

The old one was making empty ".rpl" files with 3 or 4 toris in the scene. These ".rpl" files were readable by TB v3.7, but the developpers remove the 3/4 players feature from the game, so it's impossible to read them with TB v3.8.

So it's impossible to make another 3/4 players replays generator for TB v3.8.

ok

thats if its made to generate replays but maybe someone could develop a script to do it

No, believe me, it's also impossible to do it with a script.

You should be able to play 3/4 players if :

+ You use TB v3.7
+ Nabi re-implements this feature in a future release of TB

oh well