This command gives you three more spawn eggs by just renaming three default spawn eggs. the original spawn eggs would not be affected if they are not named. get the names that you have to name the spawn eggs by clicking the item recipe sign,the spawneggs that are added are: tnt, ender dragon and wither.
How to install
How to import this command into your world
First, you must give yourself a command block (If you are on a server, you must be 'OP'ed, and have access to /gamemode 1)
To get a command block, type
/give @p command_block in the chat.
Once you have a command block, right click it to open it's GUI.
Now, you must copy and paste the command from your browser into the game. Select the entire command from below, then right click and press 'copy'.
Next, go back to your minecraft world, and paste the command you just copied into the command block. There are a few different keys that may be used to do this, depending on your keyboard. The most common ones are 'CTRL + V', 'COMMAND + V', or 'STRG + V'
Finally, you can press done to exit the GUI, and execute the command block by powering it with a redstone block, a lever, or any thing you can get your grubby hands on. Just make sure you don't place it on top of the command block, or the machine will not be installed!
Show source commands
# This user did not upload the source commands!
summon falling_block ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:falling_block,Block:redstone_block,Time:1,Passengers:[{id:falling_block,Block:activator_rail,Time:1,Passengers:[{id:commandblock_minecart,Command:gamerule commandBlockOutput false},{id:commandblock_minecart,Command:fill ~4 ~ ~3 ~11 ~2 ~5 stained_hardened_clay 13 hollow},{id:commandblock_minecart,Command:fill ~4 ~1 ~3 ~11 ~1 ~5 stained_glass 2 0 stained_hardened_clay},{id:commandblock_minecart,Command:setblock ~3 ~ ~4 wall_sign 4 0 {Text1:"{\\\"text\\\":\\\"remove\\\",\\\"color\\\":\\\"dark_purple\\\"}",Text2:"{\\\"text\\\":\\\"\\\"}",Text3:"{\\\"text\\\":\\\"\\\"}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~ ~-1 ~8 ~2 ~1 air\\\"}}"}},{id:commandblock_minecart,Command:setblock ~3 ~1 ~4 wall_sign 4 0 {Text1:"{\\\"text\\\":\\\"on/off\\\",\\\"color\\\":\\\"white\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"scoreboard players add @e[type=armor_stand,name=TogAct,c=1] 7vIocn_A 1\\\"}}",Text2:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"execute @e[score_7vIocn_A_min=1,score_7vIocn_A=1] ~ ~ ~ blockdata ~ ~ ~ {auto:0}\\\"}}",Text3:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"execute @e[score_7vIocn_A_min=2] ~ ~ ~ blockdata ~ ~ ~ {auto:1}\\\"}}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"scoreboard players reset @e[score_7vIocn_A_min=2] 7vIocn_A\\\"}}"}},{id:commandblock_minecart,Command:setblock ~3 ~2 ~4 wall_sign 4 0 {Text1:"{\\\"text\\\":\\\"item recipie\\\",\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"say @p To make the spawn eggs, rename creeper spawn egg to TNT, and wither skeleton to wither and enderman to dragon\\\"}}",Text2:"{\\\"text\\\":\\\"\\\"}",Text3:"{\\\"text\\\":\\\"\\\"}",Text4:"{\\\"text\\\":\\\"\\\"}"}},{id:commandblock_minecart,Command:summon armor_stand ~5 ~1 ~4 {CustomName:TogAct,Marker:1,NoGravity:1,Invisible:1}},{id:commandblock_minecart,Command:scoreboard objectives add 7vIocn_A dummy},{id:commandblock_minecart,Command:fill ~5 ~1 ~4 ~10 ~1 ~4 chain_command_block 5},{id:commandblock_minecart,Command:setblock ~5 ~1 ~4 repeating_command_block 5},{id:commandblock_minecart,Command:blockdata ~10 ~1 ~4 {auto:1,Command:kill @e[name=dragon]}},{id:commandblock_minecart,Command:blockdata ~9 ~1 ~4 {auto:1,Command:execute @e[name=dragon] ~ ~ ~ summon ender_dragon}},{id:commandblock_minecart,Command:blockdata ~8 ~1 ~4 {auto:1,Command:kill @e[name=wither]}},{id:commandblock_minecart,Command:blockdata ~7 ~1 ~4 {auto:1,Command:execute @e[name=wither] ~ ~ ~ summon wither}},{id:commandblock_minecart,Command:blockdata ~6 ~1 ~4 {auto:1,Command:/kill @e[name=TNT]}},{id:commandblock_minecart,Command:blockdata ~5 ~1 ~4 {auto:1,Command:execute @e[type=creeper] ~ ~ ~ summon tnt ~ ~ ~}},{id:commandblock_minecart,Command:setblock ~ ~ ~1 command_block 0 0 {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:commandblock_minecart,Command:setblock ~ ~-1 ~1 redstone_block},{id:commandblock_minecart,Command:kill @e[type=commandblock_minecart,r=1]}]}]}]}