Upvote copymoji

copymoji is a bot that lets you register and add emojis based on their id which can be found on the website.

CopyMoji

copy moji is a discord bot that makes transferring or adding emojis from one server to another
with copy moji you can register specific emojis, or all of them at once
with the website you can view and copy the id of any of our many emojis
using the previous id you can add any emoji to any server you have

Commands

/register_all
    -registers all emojis and stores them
/register_emoji <name>
    -registers the specified emoji
/add_emoji <id>
    -adds the emoji with the specified id ( must be on the website )
/credits
    -shows who made the bot

Check out the home page for the full Discord Bot List.