This tutorial is set by the author's setting without permission.

The packet format will not be taught, there are many tutorials in the encyclopedia

Main folder format:

Data/Named by yourself, you can only be a lowercase in English and down the line. Do not name it with the existing conflict/mutation_type/yourself.

.json files inside (notes after dual slope)

 {{

"EntityType": "Minecraft: Zombie", //
"ResultityType": "Mutantmore: Mutant_jungle_zombie", //
"Requiredbiomes": "Mutantmore: vanilla_mutant_jungle_zombie_required_biomes", // need to be in this group (optional) in this group (option)
"Screenshake": {// screen shaking parameters
"Amount": 0.05,
"Duration": 26,
"Range": 25
},
"ModSthatPreventMutation": [// If this MOD is installed, stop this mutation (here you can also be replaced with "RequiredMods", which means that this mod is needed)
// If this mutation involves any MOD content, it must be changed to "RequiredMods" and fills the ID of the MOD
"Dungeons_mobs" // Fill modid
]
"Requiredeffects": "Mutantmore: MutantMonsters_spider_pig_required_effects" //
} 

Global loading data packets can use module PAXI