Try the Commands Troubleshooting and Help page if you get stuff with server errors.
Minecraft summon mooshroom command
Using the summon command to spawn in mooshrooms is simple, take the command and enter into chat and presto you have a mooshroom. There are two colors of mooshroom, red and brown.
How to summon a brown mooshroom
To spawn in a brown mooshroom use the Type Nbt tag. Set Type to brown and you will get a brown mooshroom.
/summon minecraft:mooshroom ~ ~ ~ {Type:brown}How to summon a red mooshroom
To spawn in a red mooshroom use the Type Nbt tag. Set Type to red and you will get a red mooshroom, this is also the default, so any mooshroom summoned without the type tag will be red.
/summon minecraft:mooshroom ~ ~ ~ {Type:red}How to summon a baby mooshroom (mooshroom calf)
Like most passive mobs in Minecraft, you can summon a mooshroom calf by setting the Age tag to a negative number (under the "Additional" tab).
/summon minecraft:mooshroom ~ ~ ~ {Age:-1200} (Grows up in 60 seconds)/summon minecraft:mooshroom ~ ~ ~ {Age:-6000} (Grows up in 5 minutes)
Suggestions or found a bug
Leave me a comment/like on:Minecraft Versions Permalinks
If you're looking for a particular summon mob generator you can link to these specific versions of the command generator.