I've been Googling and searching for quite a while, so I bring it here to Reddit for answers.
It started with a pretty basic screen with 3 defensive options and 3 offensive options. You picked 3 moves and then sent a challenge via e-mail to someone else. They clicked a link and chose 3 of those options also. When done, two little cartoon guys battled it out using those moves.
Ugh, does that even make sense? So let's say as my first move I picked a block and my opponent picked a block. Both avatars blocked, no points. Second move I picked a hit and opponent picked a block. He got a point because he blocked my hit.
Does anyone remember what that game is called??