Here's some more Smash trivia:
All the Third-Party companies have worked with Nintendo multiple times with their IPs

Namco-Bandai: Pac-Man VS. (

was the announcer and Miyamoto helped on the game), Star Fox Assault, Mario Kart GP Arcade 1&2 (Pac-Man and the ghost were playable Racers), Soul Calibur 2 (

was a playable character in the GC version), Mario Baseball Series, Tekken Tag Tournament 2 Wii U Edition (Nintendo character costumes and Mario themed mini games), Project X Zone 2 (Mecha Fiora, Chrom and

are playable units) and Pokken Tournament. Fun fact, they also worked with Nintendo and Sega to create an Arcade system board called the Tri-Force (get it)

Sega: F-Zero GX and AX (in Shadow the Hedgehog, the bosses Black Bull and Blue Falcon are references to the F-Zero games), Mario & Sonic Olympic Series


Capcom: The Legend of Zelda: Oracle of Ages/Seasons

Square-Enix: Super Mario RPG, Fortune Street and Mario Hoops 3-on-3
Namco has worked with Nintendo the most of the 4 and Pac-Man has crossover with Nintendo multiple times before Smash