So, there are 6 wrestlers that you can receive achievements for fighting:

• El Tigrean
• Little Escarcha
• Nacho Muerte
• Senor Fuego
• Stone Hombre
• The Shadow

I remember them from back when they were first introduced to the survival event, but I can't seem to figure out how to locate them as actual battle opponents. Are they "unlocked" by betting correctly on them? Am I just missing out on something super obvious?

Thanks in advance for help me out with this.

Usually we get an announcement if they come out to fight, though not sure if they will be out this year.

It's up to staff to decide if they will be re-released this year. Hoping I get a go at Nacho Muerte! (and that I can actually beat him...)

I don't think they will be included this year, I think they went with the Pylots instead this time.