Unfortunately you’ll have to code for that.
You can find all the stuff in the pokemonsdk/scripts/XXXXX Battle Engine 25/XXXXX Battle Scene/XXXXX Battle UI/* (Of course XXXXX because I can’t remember the ID). Make sure to create your script patches in the scripts/* folder and not to edit the pokemonsdk/* because every update will erase it.
If you need some help you can check the wiki, the documentation or the Nuri Tutu’s YouTube channel then ask on Discord.