That's a Kinnikuman getup Tenryuu has with those gloves, isn't it?
The "10 million power" in the commentary confirms it.
Surprisingly, this is the first Buffaloman cosplay on Danbooru—or at least, if there are others, they're not tagged.
Also, the Admiral was either lying or confused last strip about there being only one ticket left.
dehehehI’ll bestow the ultimate Christmas!Hm hm hm,
ya scared?One day! Just one day is all I need!And here is the Tenryuu/Kiso Combo making their appearance!And now we go to Tatsuta-san and Kuma-san in the field for a report.W-what's this!? The duo are gripping tickets in their hands! And the other two escaped through the gap!Ooooh....... Not even gonna mention Tenryuu's getup, are you.Gonna get me a present of Poppo-chan!