How exactly to find these things so you can challenge them?

I dont' remember the combat too well from last year, so I'm betting it'll be a baddy taht shows up in whatever plot they have cooking for this year

Thanks. Hopefully it's something I can obtain lol 'cause those are the only two (aside from all the dancing) achievements I have left for the Masquerade.

Both were introduced from the Masquerade plot last year.

Hostile Model 1544-C is a hidden challenger, and Mecharachnid is a limited challenger. It's highly unlikely they would be back this year. Some events have achievements that could be retired, such as pandemic and the viruses.

I see. Okay well, maybe I'm SoL this time around. ^^ Thanks for the help guys.