Those with a PC Server, and using the mod "SimpleSpawners" you can use the following code to add customs to your map:
Dodowyvern: "Blueprint'/Game/ScorchedEarth/Dinos/DodoWyvern/DodoWyvern_Character_BP.DodoWyvern_Character_BP'"
Dodorex: "Blueprint'/Game/PrimalEarth/Dinos/DodoRex/DodoRex_Character_BP.DodoRex_Character_BP'"
zombie fire wyvern: "Blueprint'/Game/ScorchedEarth/Dinos/Wyvern/Wyvern_Character_BP_ZombieFire.Wyvern_Character_BP_ZombieFire'"
zombie lightning wyvern: "Blueprint'/Game/ScorchedEarth/Dinos/Wyvern/Wyvern_Character_BP_ZombieLightning.Wyvern_Character_BP_ZombieLightning'"
zombie poison: "Blueprint'/Game/ScorchedEarth/Dinos/Wyvern/Wyvern_Character_BP_ZombiePoison.Wyvern_Character_BP_ZombiePoison'"
zomdodo: "Blueprint'/Game/PrimalEarth/Dinos/Dodo/ZombieDodo_Character_BP.ZombieDodo_Character_BP'"
Remove the ""
Fear Evolved only will fully work on a couple of maps. theIsland being one.
Simple Spawner mod can be used to add any and all of the dino codes above.
Tested on Rag, LostIsland, Valguero and Amissa.