In regards to the SMG4 series, this movie takes place after the events of SMG4: Lord Of The Memes (2020) and before the events of SMG4: Mario Commits Tax Fraud (2020).
This is SMG4's first major movie and his longest video on his channel. Back in 2015, he said that he didn't have the time or effort to make a movie as long as an hour in a Q&A video. Thanks to the support of his family and friends, he finally pulled through and peaked in his effort.
At one point during the Splatfest Tari shouts "Crackerjack!", which is the catchphrase of Theo from Meta Runner (2018).
Most characters in the series this movie takes place in usually don't have people voicing them; instead, what the characters are saying is often essentially translated to the audience by way of subtitles, and over the years, sound clips have been used more and more to accompany the text.