Luigi, Paper Mario Wiki

Crinkle Goomba - Super Mario Wiki, the Mario encyclopedia

Toadsworth the Younger - Super Mario Wiki, the Mario encyclopedia

Baby Mario, MarioWiki, Fandom

King Boo - Super Mario Wiki, the Mario encyclopedia

Mario & Luigi: Dream Team - Super Mario Wiki, the Mario encyclopedia

Purple Toadette ~ Our Mystery Character by PaperMarioLife747 on DeviantArt

Bowser Jr. - Super Mario Wiki, the Mario encyclopedia

Luigi (Mario & Luigi series), Paper Mario Wiki

Supper Mario Broth on X: A very early piece of concept art for Paper Mario used sprites for Mario and Luigi that were edited from their appearances in Super Mario All-Stars +