ROM Hack Tools needed to reverse engineer CRO files?

[Izaya-Orihara]

I'm trying to increase the limit of mega evolutions in a battle from 1 to 2. I know from another user the data is located in "DllBattle.cro" file, however I don't know what tools are needed to change that limit from 1 to 2.

May I ask what tools are needed to edit that file?

Thanks.

 

[StorMyu]

Anything capable of disassembling 3ds arm so... IDA is a simple choice but if you don't know what to do with it you're gonna have a bad time

 

[Izaya-Orihara]

Anything capable of disassembling 3ds arm so... IDA is a simple choice but if you don't know what to do with it you're gonna have a bad time

Thank you so much been waiting for a reply, thanks really appreciate it.