Using the command below, you can summon an Armadillo without any mod or resource pack.

To spawn an Armadillo, you have to obtain an Armadillo Spawn Egg. You have to throw a shield and an egg to the ground to make an Armadillo Spawn Egg or right-click on the sign on the side of the command box that is written: "[​GIVE EGG]".

Watch on Youtube: https://youtu.be/gYHuvtnUAhU
Official command: https://torchcraftyt.github.io/Commands/Armadillo.html

---

Triple-click to select all the commands then right-click and choose copy. Next, get in your world, and give yourself a command block (using /give @s command_block). Paste the command in the command block (using Ctrl+C or Cmd+C). Finally, place a Redstone block next to the command block.

summon minecraft:falling_block ~ ~1 ~ {"BlockState":{"Name":"redstone_block"},"Time":1,"Passengers":[{"id":"villager","Health":0,"Passengers":[{"id":"falling_block","Time":1,"BlockState":{"Name":"activator_rail"},"Passengers":[{"id":"command_block_minecart","Command":"gamerule commandBlockOutput false"},{"id":"command_block_minecart","Command":"fill ~1 ~-2 ~0 ~6 ~0 ~4 minecraft:terracotta"},{"id":"command_block_minecart","Command":"fill ~1 ~-1 ~0 ~6 ~-1 ~4 minecraft:brown_stained_glass"},{"id":"command_block_minecart","Command":"setblock ~0 ~-1 ~1 minecraft:oak_wall_sign[​facing=west,waterlogged=false]{back_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}']},front_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"\"}','{\"color\":\"dark_blue\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"give @s minecraft:rabbit_spawn_egg{EntityTag:{id:marker,Tags:[​armadillo-spawner]},display:{Name:\\'[{\\\\\"text\\\\\":\\\\\"Armadillo Spawn Egg\\\\\",\\\\\"italic\\\\\":false}]\\'}}\"},\"text\":\"[​GIVE EGG]\"}','{\"text\":\"\"}','{\"text\":\"\"}']},is_waxed:1b}"},{"id":"command_block_minecart","Command":"setblock ~0 ~-1 ~2 minecraft:oak_wall_sign[​facing=west,waterlogged=false]{back_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}']},front_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"Armadillo\"}','{\"text\":\"Command box\"}','{\"text\":\"Made by\"}','{\"text\":\"TorchCraft\"}']},is_waxed:0b}"},{"id":"command_block_minecart","Command":"setblock ~0 ~-1 ~3 minecraft:oak_wall_sign[​facing=west,waterlogged=false]{back_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}','{\"text\":\"\"}']},front_text:{color:\"black\",has_glowing_text:0b,messages:['{\"text\":\"\"}','{\"color\":\"dark_red\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"fill ~ ~-1 ~-3 ~6 ~1 ~1 air\"},\"text\":\"[​UNINSTALL]\"}','{\"text\":\"\"}','{\"text\":\"\"}']},is_waxed:0b}"},{"id":"command_block_minecart","Command":"setblock ~5 ~-1 ~3 minecraft:repeating_command_block[​conditional=false,facing=west]{Command:'/execute as @e[​type=item,nbt={Item:{id:\"minecraft:egg\"}}] at @s if entity @e[​type=item,nbt={Item:{id:\"minecraft:shield\"}},distance=..1] run tag @s add armadillo-spawn-egg',CustomName:'{\"text\":\"@\"}',LastExecution:701983L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~4 ~-1 ~3 minecraft:chain_command_block[​conditional=false,facing=west]{Command:\"execute as @e[​tag=armadillo-spawn-egg] at @s run particle happy_villager ~ ~.5 ~ 0.2 0.2 0.2 5 10\",CustomName:'{\"text\":\"@\"}',LastExecution:702069L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~3 ~-1 ~3 minecraft:chain_command_block[​conditional=false,facing=west]{Command:'execute as @e[​tag=armadillo-spawn-egg] at @s run kill @e[​type=item,nbt={Item:{id:\"minecraft:shield\"}},distance=..1,limit=1]',CustomName:'{\"text\":\"@\"}',LastExecution:702122L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~2 ~-1 ~3 minecraft:chain_command_block[​conditional=false,facing=north]{Command:\"execute as @e[​tag=armadillo-spawn-egg] run data merge entity @s {Item:{id:rabbit_spawn_egg,tag:{EntityTag:{id:marker,Tags:[​armadillo-spawner]},display:{Name:'[{\\\"text\\\":\\\"Armadillo Spawn Egg\\\",\\\"italic\\\":false}]'}}}}\",CustomName:'{\"text\":\"@\"}',LastExecution:702176L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~2 ~-1 ~2 minecraft:chain_command_block[​conditional=false,facing=east]{Command:\"execute as @e[​tag=armadillo-spawn-egg] run tag @s remove armadillo-spawn-egg\",CustomName:'{\"text\":\"@\"}',LastExecution:702273L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~3 ~-1 ~2 minecraft:chain_command_block[​conditional=false,facing=east]{Command:'execute as @e[​type=minecraft:marker,tag=armadillo-spawner] at @s run summon sniffer ~ ~ ~ {\"active_effects\":[{\"id\":\"minecraft:invisibility\",\"duration\":999999f,\"show_particles\":false}],HandItems:[{id:\\'scute\\',Count:1},{}],HandDropChances:[​1f,1f],\"DeathLootTable\":\"minecraft:empty\",\"CustomName\":\"[{\\\\\"text\\\\\":\\\\\"Armadillo\\\\\"}]\",\"Tags\":[\"armadillo\"],\"Passengers\":[{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:jungle_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.4688f,0f,0f,-0.1875f,0f,0.4688f,0f,-0.9562f,0f,0f,0.75f,-0.1007f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:stripped_spruce_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.1875f,0f,0f,-0.036f,0f,0.1326f,-0.1989f,-0.7687f,0f,0.1326f,0.1989f,0.5893f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:pink_terracotta\",\"Properties\":{}},\"transformation\":[​0.1905f,0f,0f,-0.0375f,0f,0.0663f,-0.0663f,-0.8287f,0f,0.0663f,0.0663f,0.7955f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:stripped_spruce_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[-0.0544f,-0.049f,0.0049f,0.0109f,-0.0155f,0.1809f,0.0008f,-0.675f,-0.02f,-0.0065f,-0.0141f,0.7393f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:stripped_spruce_log\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.0564f,0.0421f,0.0039f,0.1046f,-0.0148f,0.1813f,0.0009f,-0.675f,-0.0142f,-0.0225f,0.0145f,0.7243f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:coal_block\",\"Properties\":{}},\"transformation\":[​0.075f,0f,0f,-0.0375f,0f,0.053f,-0.053f,-0.7276f,0f,0.053f,0.053f,0.7063f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:coal_block\",\"Properties\":{}},\"transformation\":[​0.075f,0f,0f,0.078f,0f,0.053f,-0.053f,-0.7276f,0f,0.053f,0.053f,0.7063f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:jungle_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.0938f,0f,0f,0f,0f,0.0906f,0.1941f,-1.05f,0f,-0.0243f,0.7244f,-0.6632f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:mangrove_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.1875f,0f,0f,0.0825f,0f,0.2813f,0f,-1.05f,0f,0f,0.1875f,-0.007f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:mangrove_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.1875f,0f,0f,0.0825f,0f,0.2813f,0f,-1.05f,0f,0f,0.1875f,0.368f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:mangrove_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.1875f,0f,0f,-0.1725f,0f,0.2813f,0f,-1.05f,0f,0f,0.1875f,-0.007f,0f,0f,0f,1f]},{\"id\":\"minecraft:block_display\",\"block_state\":{\"Name\":\"minecraft:mangrove_wood\",\"Properties\":{\"axis\":\"x\"}},\"transformation\":[​0.1875f,0f,0f,-0.1725f,0f,0.2813f,0f,-1.05f,0f,0f,0.1875f,0.368f,0f,0f,0f,1f]}],\"Silent\":false,\"Age\":-999999f,\"ForcedAge\":-999999f}',CustomName:'{\"text\":\"@\"}',LastExecution:702376L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~4 ~-1 ~2 minecraft:chain_command_block[​conditional=false,facing=east]{Command:\"/kill @e[​type=minecraft:marker,tag=armadillo-spawner]\",CustomName:'{\"text\":\"@\"}',LastExecution:702430L,LastOutput:'{\"extra\":[{\"color\":\"red\",\"extra\":[{\"translate\":\"argument.entity.notfound.entity\"}],\"text\":\"\"}],\"text\":\"[​19:14:54] \"}',SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~5 ~-1 ~2 minecraft:chain_command_block[​conditional=false,facing=north]{Command:\"/execute as @e[​tag=armadillo] at @s on passengers run data modify entity @s Rotation[​0] set from entity @e[​distance=0,limit=1] Rotation[​0]\",CustomName:'{\"text\":\"@\"}',LastExecution:702490L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~5 ~-1 ~1 minecraft:chain_command_block[​conditional=false,facing=west]{Command:\"/execute as @e[​tag=armadillo] at @s on passengers run tag @s add armadillo-body\",CustomName:'{\"text\":\"@\"}',LastExecution:702560L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~4 ~-1 ~1 minecraft:chain_command_block[​conditional=false,facing=west]{Command:\"/execute as @e[​tag=armadillo-body] run tag @s remove alive\",CustomName:'{\"text\":\"@\"}',LastExecution:702611L,LastOutput:'{\"extra\":[{\"translate\":\"commands.tag.remove.success.single\",\"with\":[\"alive\",{\"insertion\":\"9acdef24-cd0b-4fd2-a50c-0c3205bd3e29\",\"hoverEvent\":{\"action\":\"show_entity\",\"contents\":{\"type\":\"minecraft:block_display\",\"id\":\"9acdef24-cd0b-4fd2-a50c-0c3205bd3e29\",\"name\":{\"translate\":\"entity.minecraft.block_display\"}}},\"translate\":\"entity.minecraft.block_display\"}]}],\"text\":\"[​19:15:03] \"}',SuccessCount:60,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~3 ~-1 ~1 minecraft:chain_command_block[​conditional=false,facing=west]{Command:\"/execute as @e[​tag=armadillo] at @s on passengers run tag @s add alive\",CustomName:'{\"text\":\"@\"}',LastExecution:702664L,LastOutput:'{\"extra\":[{\"translate\":\"commands.tag.add.success.single\",\"with\":[\"alive\",{\"insertion\":\"9acdef24-cd0b-4fd2-a50c-0c3205bd3e29\",\"hoverEvent\":{\"action\":\"show_entity\",\"contents\":{\"type\":\"minecraft:block_display\",\"id\":\"9acdef24-cd0b-4fd2-a50c-0c3205bd3e29\",\"name\":{\"translate\":\"entity.minecraft.block_display\"}}},\"translate\":\"entity.minecraft.block_display\"}]}],\"text\":\"[​19:15:05] \"}',SuccessCount:60,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~2 ~-1 ~1 minecraft:chain_command_block[​conditional=false,facing=west]{Command:\"/execute as @e[​tag=armadillo-body,tag=!alive] run kill @s\",CustomName:'{\"text\":\"@\"}',LastExecution:702729L,SuccessCount:0,TrackOutput:1b,UpdateLastExecution:1b,auto:1b,conditionMet:1b,powered:0b}"},{"id":"command_block_minecart","Command":"setblock ~ ~1 ~ command_block{Command:\"fill ~ ~ ~ ~ ~-3 ~ air\",auto:1}"},{"id":"command_block_minecart","Command":"kill @e[​type=command_block_minecart,distance=..1,tag=!debug]"}]}]}]}