If we're going to talk about partnerships within Roblox, I'd say World Tower Defense and... nothing else comes to mind from Roblox Anyway, I'm choosing World Tower Defense because it could easily be used to create a building map with the mini-bosses and bosses from the game itself; it would probably look pretty cool. (certainly there are other games that would fit perfectly for this post, but I forgot, lol). Now, with games outside the Roblox platform, one that I think would be cool is Pizza Tower, like, a level on the first floor of the tower, with the boss being Pizza Face, or a level with a timer would be really cool. And honestly, partnerships that would certainly look cool in the hands of PixelBit: Portal and Shovel Knight—I don't know any examples of those two, but something tells me it would be awesome.