Godzilla minus one vs Bigger problems bosses(Terrestre)[Minecraft bedrock Edition]

Godzilla minus one link:
mcpedl.com/god...
Bigger Problems: Rebirth
link: mcpedl.com/big...
Bigger Problems Old version(Goliath and Frostworm)
link: www.mediafire....
Just to make it clear, the Two Complements Bigger Problems Can't Stay Together is either one or the other
"but how did I manage to have the Rebirth creatures with the old ones"
I simply went to the Old version files and put it in the New one, then I did it manually