Luigi has not had any interactions with Mario and most of the main characters since 2010.
Luigi looks the same as his game counterpart with minor differences. Similar to Mario, he has a cap and blue overalls, along with white gloves and brown shoes, but has an "L" on a green cap with green clothing (this is because of complementary, or opposite colors), and slightly darker overalls. Luigi is also more slimmer and taller than Mario.
Luigi is a nice and friendly person, but always a bit afraid.
He likes Mario very much and would do anything to be like him.
He is his clone counterpart.
Chef Pee Pee
They have know that they are friends. But he does not know if he seen him before.
He hates Bowser just like Mario because he knows that he's very evil.
He has known that Black Yoshi is a criminal. But he never knew Black Yoshi has red shoes.
They both got an argument. He thinks because they are enemies.
Luigi was in Woody's pound at one point for pooping on Mario's lawn.