The stump joke from Monkey Island 3 can be found in the underground catacombs in Nuevo Marrow. When you try going through the tunnel with the albino crocodile thingy, Manny says, "Wow! It's a tunnel that opens onto a system of catacombs!" that's the same thing that Guybrush Threepwood from Monkey Island 3 says when you go through the crack in the wall at the Goodsoup Crypt and end up back in Monkey Island.

At the end of Year 3, when you're sailing away from the island at the Edge of the World, Manny says a quote from Hal Barwood in Monkey Island 2: "Works like crazy! Full speed ahead!"

In the poster at the Tattoo Parlor in Rubacava, there's a poster with a face of Max, from Sam & Max Hit the Road. There's also a Corley Motor's (from Full Throttle) logo on the same poster as the Max one.

Star Wars: Episode 1 The Phantom Menace
If you look at the bottom right screen of the pod race audience (after the race) you will see a crowd cheering, and Manny Calavera!

In the trailer of Grim there was a really short scene where most of the people from Rubacava were in the festival at El Marrow. Is this in the game because I can't find it at all A) It's a trailer not everything you see is shown. * But if you look carefully at the background people behind the tents as you walk to the festival you can see some people from Rubacava as well as the 4 member mariachi band! Also while you are talking to the Clown in the aisle behind the tent you can see Bogen talking to a couple of Beatniks!

Go to Eva's desk next to the hole punch. After punching the playing card stand aside and wave the card at Eva (hit enter). She will say "Maybe card tricks some other time when I'm not so busy."

Now turn about a quarter turn without moving left or right. Hit enter. Manny will say "I don't feel like pitching cards right now."

Here's the Easter egg. While Manny is saying "I don't feel like pitching cards right now" Turn and face Eva. Before he is through talking hit Enter again.

Eva will say her line, but it will come out of Manny's mouth!!! Try it!

In Toto Santo's tatoo parlor there is a poster of some kind with illustrations of tatoos on it - the tatoos include Max and the Corley Motors logo. Also in year four, after you knock down the neon sign you can see another neon sign in the background: again, it's the Corley Motors logo. I have screenshots of these in the Grim Fandango section of my web page.

In Domino's Office you can drink his beer, you can punch his boxing sack thingy, and you can try to guess his password on the computer, Manny will say a bunch of funny things like "Goldenboy"