It's Bowmasters. And it's time to check out more of the awesome fatalities this game has to offer. It's pretty much a children's Mortal Kombat and very family-friendly!
if you upgrade a character you can select the first "version" but you will unlock the 2 also, and they will have new animation,powerful and also BRUTALITIES
im an og of bowmasters from 2017 so to upg it u have to get a certain amount of gems check the amount u need by pressing the upgrade button and the first one i recommend u to get is Ron Ettienne
Look ill tell you all about it the most helpful comment, some characters don't have it but some of them do. And as you said, the upgrade makes the characters look better and theirs a brutality instead of a fatality. The ones that has a crown on top means you can upgrade, their now you know. Know have fun with the beautiful brutality