When Himekawa does his thing, he does it all the way.
Spoiler for Chapter 218 raw:
Not only did he double cross, he got his entire Pompadour Brigade to switch with him as well! And he invoked 'Pretty Boy Himekawa' Mode to do it too. Talk about salt on the wound.
Oga wins, everyone is in awe, and Saotome's got no money but more problems.