Suggested by Sonic Bowser Jr is a pretty cunning opponent. With his mini car and his cannon balls the guy is a serious threat. However, Ken has something up his sleeve that Bowser Jr simply cannot counter. That is his famous fire Shoryuken. One hit from that and Jr is down for the count. He won’t be able to evade Ken for long so at best he can delay the inevitable. That is what it means to take on a Masters. Ken Masters wins.