Hi @Ismael NikiemaGHX - Welcome to the Community!
As far I know you can create you own custom emoticons..
You can upload png, gif (animated gifs happily supported) and jpg images up to 2MB of any resolution, with a minimum of 30px on each side. Those would be automatically resized.
If you have a whole bunch of images you want to turn into emoticons, put them in a .zip file and upload them all at once. (Your .zip file can contain as many as 50 emoticons.)
Got your images ready? -> Log in to Hipchat in your browser and go to Emoticons.
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