You can start by posting that logs/debug.log. Like I said above it might identify the mod or what the real problem is.
Otherwise you will have to remove mods one-by-one until the problem goes away.
Then you will know which mods it is.
After that it is a case of checking you have the correct/latest version of the mod and all its dependencies.
And finally talking to the mod author about the problem.
The error says one of your mods created a ForgeSpawnEggItem but didn't register it (properly).
This error doesn't say which mod is responsible.
Your logs/debug.log might contain more information, e.g. an error saying why it was not registered.
This is not a question.
If you want help, show the code (preferably using a github repository) and explain what it is not working in detail - not "it does not work".
If you want tutorials or somebody to write your mod for you, this is not the place for that. This is a support forum not a teaching forum.
It already took 20+ posts on this thread for you to do something as simple as drawing a texture on a screen.
This suggests to me you need to put some work into learning the basics, either java or the minecraft/forge codebase.
e.g. look at vanilla code that does something similar to what you want to do and try to understand it
don't just copy/paste, you will never learn if you don't understand