Edit: changed background color.
Box art for Mario & Luigi: Partners in Time (Nintendo DS, 2005).
To the left in the background, from top to bottom, Shroob UFOs are blasting yellow rays toward the ground. Silhouettes of many Shroobs, along with Junior Shrooboid and Elder Shrooboid, are crowded together and look toward the viewer with their red glowing eyes as they hold an unconscious Princess Peach. Baby Bowser grins mischievously, showing one of his canines.
To the right in the background, from top to bottom, the same yellow rays from the UFOs are crashing down on Peach's castle, destroying parts of it and causing dust clouds to fly up. A green Yoshi and a red Toad look on in horror at this destruction. A time worm hole is swirling about. Kylie Koopa smirks, holding up her camera. Toadsworth the Younger and elder Toadsworth look toward each other. Toadsworth the Younger's eyebrows are raised, as if mildly surprised. Baby Peach rides in her crib as she looks upward.
In the bottom left is an ESRB rating showing that the game is rated E for Everyone. In the bottom right is the Nintendo logo. On the left side, a white bar has the Nintendo DS logo. At the top of the illustration is text reading, "MARIO & LUIGI: PARTNERS IN TIME." "MARIO & LUIGI" is outlined in white and has a cartoony font. "MARIO" is red, "&" is blue and "LUIGI" is green. "PARTNERS IN TIME" is written in serif font, similar to Times New Roman. It is white outlined with black. End ID.]
A Lakitu, their cloud and their (lazy) pet Spiny.
Wario, please, you're killing me--
ohmygod WARIO WORKING OUT TO COUNTRY MUSIC.... ... wario is on another level of power... *imagines wario doing push ups to old town road* 😔
Super Mario AU where Luigi is the oldest brother.
Things are pretty much the same, but Luigi is a tad bit more confident from the get-go and also more protective of Mario.
Potentially, this could also mean that Mario was the kidnapped baby in Yoshi's Island, and Luigi was the one to travel with Yoshi to save him.
Not pictured is Sonic embarrassed by his parents.
theres a lot going on this one... but this image makes me LOSE it everytime cos of the fact that bowser is frickin TICKLING toad... like omigod... my GOd... I CANT GET OVER IT...