Voice acting credits?

I think all of the minifigs except Chell _do_ have a handful of lines recorded. Each character has three optional lines that they'll say when you load them into the game, and three more optional lines that they'll say when you load them out again (keep in mind that loading multiple characters in/out in quick succession causes most of these lines to abort). Additionally, characters have vehicle/gear interaction lines (I just reported a typo in the text captions for a line Harley Quinn says when climbing into her own car), and many characters will throw out a one-liner in reaction to the presence of another character, depending on which characters the game designers thought had ties to each other. So Emmet/Owen will react with each other because Chris Pratt played both characters and it makes for a meta joke. Various DC characters will react with each other because they're from the same property. The Gamer Kid keeps asking Batman if he can try on the cowl because it's something they thought fit the character. Active characters (ones you're directly controlling vs ones that are trailing you because they just happen to be loaded) will react to collecting gold bricks and character tokens, standing idle, and probably a few other trigger events that I'm just not thinking of right now. Various characters will throw out lines while you're travelling through a portal to a different level/world (this one gets a bit annoying after a while as it's randomized based on who happens to be loaded into the game at the time, so if you only have _one_ character loaded you'll probably hear the same line at least a few times befored you arrive...unless it's Chell). And it's not just the minifigs. K-9 is a vehicle of sorts, and has a few lines of dialogue as well. I think the Dalek (same situation) might too. Regardless, all of the minifigs except Chell (and maybe Stay-Puft?) probably have anywhere between 10-20 lines of additional dialogue attached to them, outside of any cutscenes you'll see in any of the levels. All six of the Level Pack characters, the three Starter Pack characters, and several others (especially the handful of playable villains) have dialogue that you'll run across just by playing levels or exploring worlds, but a fair number of these minifigs probably have dialogue that is only accessible by loading the minifig into the game.

You know what noone tells you about cooking with the Dark Side? The food is really good!