OK guys, many of us are probably tired of the boring stock emojis we have on our devices, even on the so called marshmallow (6.0) .
Well am gonna be brief as possible, and am gonna show you how you can change your stock Emoji to look beautiful and understandable.

Requirements for this:
1. A rooted Android device
2. Es file explorer
3. Emoji1.ttf

Before we proceed this is what my emoji looks like right now above..
Procedures:
1. Download the emoji1 file
2. Open es file explorer and extract the file to your sdcard
3. Enable root explorer on your es file explorer and click on root explorer
4. Now click on MountR/W and select RW for all protocols
5. Rename the e1.ttf to NotoColorEmoji.ttf
6.Copy/Cut the NotoColorEmoji.ttf and go to the root of ur Device
7. Paste it in the following directory system/fonts
8. Now you'll be prompted to overwrite the existing NotoColorEmoji file, tick overwrite all and overwrite.
9. After this, locate the NotoColorEmoji file in your system/font path, press and hold on it and select Properties.
10. Now in Properties, click on change permissions and tick as follows;

Read. Write.
☑
☑
☑
☑
That is, tick the 3 Read boxes and 1 Write box,
And press OK.
Now close it all up and Reboot ur device.
When ur device is finally booted, your emojis wuda changed.

http://www.droidgurus.com/2016/01/how-to-change-your-android-stock-emojis.html?m=0#more

Must your device be rooted before you could use an Emoji