Recently Squidboards reported on a potential leak that would say some sort of crossover between Splatoon and Super Mario Sunshine would be coming sooln, with a potentiall new weapon in F.L.U.D.D. and amiibo compatibility with the Mario amiibo. Recently, a total of nine pictures have surfaced which could poitentially point to this crossover being a real possibility. Keep in mind this is E3 week and fake leaks are certainly a possibility as are real leaks.
Among these recently released pictures include the picture with an inkling taking on Petey Pirhana as well as Mario in squid form all done in the art-style of official artwork. On picture focuses directly on the Mario squid while another shows both pictures together.
This art showing what looks to be concept art of new gear that is heavily themed in Mario style with a Yoshi hat and Mario outfit. The shirt farthest on the right is also shown available for purchase within the game in a screenshot. Another screenshot shows "New Gear" in Mario's Hat, Overalls, and Boots.
The F.L.U.D.D. is also shown within a screenshot as a potential new weapon. Presumably all of these weapons and Mario related gear would be unlocked with unique challenges provided by the Mario amiibo (similar to the current Splatoon amiibos). According to one final screenshot these will all become available on August 14th. Real or fake? With Nintendo's E3 digital event coming soon, we just might find out, but feel free to leave those initial impressions in the comments below!