Only tested on 1.20 - If you test it on other versions lemme know so I can add them!
All this does is rename every baby zombie to "Baby Gronk" and if you get killed by Baby Gronk it has some custom messages. If you have any ideas for more messages I can add, you can let me know on GitHub issues and I'll add them!
To Clarify:
Any time a baby zombie spawns, there name will be set to "Baby Gronk" and when a "Baby Gronk" kills a player, a custom death message will be shown from a list of death messages I hard-coded into the plugin, instead of the vanilla death message. I am working on adding a config for this so you can add your own death messages!