Quario first debuted in Into the Fourth Dimension, as Mario's 4D counterpart. He helped the heroes from the next dimension all the way through their adventure, until Mario was captured, forcing Quario to be knocked out. He was knocked out for a majority of the advenutre, until Part 18, where he woke up and resumed his help with the heroes.
In "5 is real - The Secret of the Fourth Dimension", Quario comes to Mario, telling him that the secret of the Great Crown is revealed.
Special "Other" Videos
He has also appeared in numerous videos of Starman3, like "Starman3's 5000 Subscribers Adventure!", where he appeared to congratulate Starman3 on getting so many subscribers. He also appears in "Starman3 visits the Fourth Dimension," to where he questions why Starman3 can now visit the Fourth Dimension on his own, but quickly learns and leads him towards Starman4, as does Fourigi.
He also appears in Blooper 44, as he helps the main YTR have fun. He's also one of the few to not get knocked out when Dowser knocks everyone out.
Quario is alerted to the fact that the Rainbow Colonies have been found, and brings Mario and his friends over to see, but also to get them to help them defeat Dowser, who is after the Rainbow Shards, shards that were lost in each of the Rainbow Colonies. Quario explains the story and their mission to the heroes and appears to help them very much like what Stario did in the Moon World.
Counterparts and Other Relevant Characters
- Mushroom Kingdom/Blooper Land counterpart: Mario
- Star World counterpart: Stario
- Dimension X counterpart(doppelganger): Oiram
- Crown Dimension counterpart: Quinario