Nintendo64th universe

The Nintend64th universe is the shared and interconnected universe the various Nintendo worlds/franchises inhabit. Each galaxy is one that holds planets and celestial bodies seen in series' from Mario, to Metroid, to Pikimin and Starfox and the alien species' canon to their titles. Each Galaxy has a line of star clusters reaching one another all connected tio a giant power battery (seen in season 4) which is probably the source that sustains the many power across the galaxies.

Interactions
It is implied by Meta Knight in "SuperClubBros", that travelling did happen prior to the creation of Main Stagia. "It is how they came to be" almost implying the various species seen in the universes are a result of one another. The various humans, dragon/monsters, anthropomorphic and intelligent animals, plants, objects could all be linked to the migating, magic, evolving, inbreeding ( and the aritifcially made Mii's) of the various peoples. Though many universes have lores of their own involving gods, This is still shown to be true as the gods are present throughout the series.

Main Stagia was made on land between these galaxies as a giant city built by the minions of Demise, Hades and Mayor Hand. And it is shown trade and travel started to continually happen as through space travel and sail. As seen in Linkles ship in "Little Hyrule warriors" and told by Kapp'n in Season 4 episode 1 "Starwolf: Assault". It also stated by Mayor Hand that he tested this first with the neighbouring SEGAverse which exists in the same way as the Nitnendo64th universe but with Sega worlds. Some franchises also share worlds as Gilius states in "Whisps Unleashed" in statement on their conectiveness. It is reveelaed in " Captain Rainbow Chronicles" that the city exists on a massive Titan, meaning this creature existed between the galaxies.

Dimensions seen possibly within the universes
- Chaos dimension (Tabuu is god there, Demise, Hades and Hand were banished there, and a season 4 episode titled "Wind Fish Awakening" will reveal more

- Pictochat realm ( Mr. Kawashima is master there, wii fit trainors are from there, realm is almost sentient and will play  Brainage/pictochat style tricks on suspects)

- Mimin Island ( an island underneath the city and seems to be artificially built in a bunker to lore the captured and test skins on them. maganed by Crazy Hand)