Season 4

Season 4 of Cool Mario Bros aired from April 2018 to November 11, 2020 On DR2 (SD Format) & DR3 (HD Format). It was going to have 9 episodes, but got extended to 12 in June 2019. It is based on the Ultra Finale storyline. According to the creators, Jodeci Rice & Sebastian Cyr, This is the definite final season. It will feature the return of characters like Bowser.Jr (Having being revived By Jeffy) & Yoshi (He had a cameo In Season 3).

Episodes

 * 1) Mario Plays 7 GRAND DAD-Steve the Cat gives Mario a mysterious NES cartridge. He doesn't know what it is until he starts playing it. Will he enjoy it, or will he get angry over it as always? Find out.
 * 2) Mario Meets Swagmaster & Chris-Mario gets captured by Jeffy's new bounty hunter. A grey arctic fox named Axel. He is sent to a cage to see his old friend Logan Underwood (Sebastian Cyr) and meet SwagMaster and Chris f. They end up getting thrown in with them and they escape together.
 * 3) Steve’s Love Problem
 * 4) Mario Gets A Nintendo Switch
 * 5) The Luigi and the Bunny
 * 6) The Lost Bird
 * 7) Mario and the Boys
 * 8) Survival Mode Part 1
 * 9) Survival Mode Part 2
 * 10) Bowser Jr Returns?!
 * 11) A Mario to The Past
 * 12) Ultra Finale

Delay
On June 1st 2018, JGS TV said "Due to production problems, Cool Mario Bros Season 4 Episode 3 will not air this month. Our team, Denmark Radios and CBS-FOX will let you know when the next episode will air". On STV's Memorial Day 2019 Announcements, Cool Mario Bros was announced to air the rest of Season 4 in 2019, along with STV being the home of uncensored CMB. However, the series aired until November 2020.