Metamorph Mod 1.18.2/1.18/1.17.1/1.15.2 - Turn Into Other Creatures
Metamorph - Morph Mod For Minecraft 1.12.2 | PC Java Mods
Metamorph Mod 1.18.2/1.17.1/1.12.2 for Minecraft
Someone made a morph mod for FORGE in 1.16.5, and it's actually pretty good, you get the mobs abilities and it's essentially 1.16.5 port of the metamorph mod, however it's extremely new,
Metamorph Mod (1.19.4 - 1.18.2 - 1.17.1) Minecraft