Tuna "Tuner" Fish

Reader-submitted artwork of Peach with peaches, featured in a 2004 issue of the Japanese Nintendo Dream magazine.

Source: Nintendo Dream (Japan), Issue 120, 2004

Officially licensed Super Mario Bros. holographic wristwatch (and its packaging) from Japan.

Source: blacktangent

In Super Smash Bros. Brawl, if Wario is knocked off his Wario Bike by an attack on the same exact frame as he would fall of the bike on his own (e.g. due to riding too long), he will drop two bikes at the same time.

The bottom left and bottom right animations show slowed-down versions of the same scenario except that in the bottom left one Wario falls off normally, while in the bottom right one Ganondorf attacks him on the correct frame for the glitch to activate.

Interestingly, both bikes need to be destroyed for Wario to be able to use the Wario Bike move again after this.

Cover of a 1997 issue of the Next Generation magazine, featuring the head of a Mario render (particularly his punching render from Super Mario 64) behind shattered glass.

Source: VGArtAndTidbits