Not like I'll ever write any crossovers for LBT, but if I had to think of one...
Red vs Blue meets Land Before Time
(Forgive me if it was already mentioned)
Church: ...What the @#$! is that thing?
Tucker: ...Is it a dog? Chicks love guys with dogs.
Caboose: Puppy!
Sister: aww, a dog! Hot!
Simmons: That's not a dog you idiots, that's a dinosaur
Griff: I think that an apatosaurus
Sarge: GRIFF! I told you to stop making up animals!
Simmons: Sarge is right Griff, it's annoying
Griff: First of all, Simmons, shut up. Secondly, That's it's name!
Sarge: I say we kill it! Then dissect it....for science...
Donut: I wish I had a pet like that long-necked thing...it could match my armor! Teehee!
Doc: Has it been taken to the vet? You should always make sure it doesn't have rabies. Better safe then sorry
Lopez: <In spanish> There are no vets near here.
Doc: Well then, I guess we aren't keeping it.
Sarge: Oh well, looks like it needs to be put down....where's my shotgun?
Caboose: DON'T HURT PUPPY!
Simmons: for the last time it's not a dog!
Tex: I'll do it if you want..of course, it will cost ya.
Tucker: That's what you said last night. Bow Chicka Bow Wow
Tex:....I'll kill tucker for free if you like..
Church: He's all yours
Tex: *BAM!*
Tucker: OW! What the @#$!
*somewhere near-by*
O'mally: Those fools! While they bicker amongst themselves, I will control these beasts to devour their weak, pathetic corpses
Wyoming: I say, Ol' chap, I don't know why we just don't shoot them from here.
O'Mally: Silence you fool! That would be way to easy. No, we need something complex, some brilliant, something pure EVIL!
Wyoming: Righto then.