This tool lets you find possibly copied emotes on Twitch and FrankerFaceZ for the ones you select to check.
The "Max difference" option lets you select how strict or lenient the search should be.
For example, a difference of 0 is a very strict match (basically no difference) while 50 would be much more lenient. Anything above 75 generates a lot of false positive.
To get the best results please use the highest resolution (112x112) when checking for alts.
Found a theft but don't know how to file a DMCA takedown notice? Check this guide.