>>535068925
>>535068975
So from what I understand, that IS6 stage references the Battle of Hulao Pass (虎牢关), a fictional battle in Romance of The Three Kingdoms
The 3 animal dudes in that stage reference the Three Heroes, down to the preferred weapons of those people (Picrel). I'm pretty sure the arrangement of the 3 guys are also references to the order in which each of them joined in to fight Lü Bu.
As for José, I think that is a reference to Gongsun Zan (公孫瓚), who fought Lü Bu but had to retreat, prompting 1 of the Three Heroes to taunt Lü Bu into a fight. Then it became a 2v1, and then 3v1, which finally proved to be more challenging than what Lü Bu could handle.
The Battle of Hulao Pass anded with Lü Bu's defeat, though he made it out alive.
https://en.wikipedia.org/wiki/List_of_fictitious_stories_in_Romance_of_the_Three_Kingdoms#Battle_of_Hulao_Pass