Luigi, Mario and sonic Wiki

Luigi or Luigi Mario (in the films) is Mario's sidekick brother in most Mario Games. He usually accompanies him on many dangerous adventures and has a rivalry with Sonic and Tails. He is the younger twin brother and usually is scared of Boos. He is actually known as the plumber who's done most adventures that Mario does and also his own adventures like Luigi's Mansion and the sequel, Luigi's Mansion 2. After a failure of Donkey Kong 3, Nintendo decided to put Mario and Luigi together in a series

Sonic (SSB4) - SmashWiki, the Super Smash Bros. wiki

Mario & Sonic at the London 2012 Olympic Games, Sonic Wiki Zone

Mario & Sonic at the Olympic Games + VeggieTales, Big Idea Fanon Wiki

Sonic and Tails vs Mario and Luigi, DBX Fanon Wikia

Mario & Sonic at the Olympic Winter Games (Wii), Super Luigi Wiki

Luigi, Mario Racing Wiki

Mario, Sonic Wiki Zone

Shadow (character) - Super Mario Wiki, the Mario encyclopedia

Mario+Luigi'' RPG Style: Sonic the Hedgehog by Mast3r-Rainb0w on DeviantArt

Mario, Mario and sonic Wiki

Luigi, Mario and sonic Wiki