A robotic music machine from Aunt Jenny's early days as an inventor goes haywire. Riley, Alex and Theo transform into Megablast to save the day, while Theo/Thunder must overcome his unease about improvising!

Right before Riley's band has a concert at the retirement home, they have to transform into Megablast and find a way to reverse the effects of Kaboom's latest invention - a device that turns anyone into babies!

Megablast helps out a local ice cream truck and sells out all the ice cream before Stewey can get any. He transforms into Gooey and uses ice slime to turn everyone into freeze-brained minions to rip the town apart!

Riley struggles to find the perfect sound in her new song. Meanwhile, Starlet enlists a synthetic computer and unleashes ultra-magnet powers on the town! Together, they learn that when it comes to songwriting, sometimes less is more.

Riley is challenged when Alex develops a love of long drum solos. Meanwhile, Kaboom is bringing all of Greenville under his control with his latest invention: hypnotizing glasses called "Idolizers" that make people see him as a genius!

Megablast writes an awesome new dance song that goes viral! Starlet is horrified to discover the hit is more popular than hers. Starlet will do everything in her power to end Megablast's popularity surge, even if it means destroying the internet!

Megablast goes up against Metal Mike to make a music video in a local contest! But when Metal Mike's video causes chaos in Greenville, the kids find themselves with the difficult challenge of having to be in two places at the same time!

When Dr. Dandelion engineers a Stink Monster odorous enough to force all the residents out of town, our Superheroes must find a way to defeat the ever-growing Stink Monster before it turns Greenville into Stinkville!

Beatrix runs away after feeling neglected when Riley is so focused on writing a new song. However, Beatrix is in for a big surprise when she accidentally eats some of Dr. Dandelion's Gigantor Cabbage and grows to the size of a building!

Riley, Theo, and Alex discover scoring, take it to the streets, and provide live scoring all around Greenvile! Meanwhile, The Copycats have taken the form of monsters to scare everyone out of Greenville and turn it into their own skatepark.

Megablast is the opening act for headliner Zozo at the Greenville Beach Bash. However, the day takes a chilly turn when Stewey/Gooey traps all of Greenville under a snow dome!

Megablast has been asked to perform a new song at Green Fest. But when Riley gets interviewed by a videographer, she suddenly gets tongue-tied. The event gets derailed when Metal Mike crashes the party and begins polluting everything in sight!

While preparing to perform at the Greenville Talent Show, Megablast gets trapped by the Copycats, who have taken the whole town hostage! The kids must free the trapped townies and thwart the shape-shifting tri

After Stewey's Mom gets tired of hearing Stewey play his favourite song, he becomes Gooey and slimes anything that plays music in Greenville! When Rocket is the only one not slimed, she goes head-to-head with Gooey to get the music back.

Megablast decides to sample one of Riley's mom's old hits. Meanwhile, Dr. Dandelion has created a giant plant penthouse over Greenville! The kids must stop the pilfering plant before its weight collapses on the town!

After a Megablast jam is derailed by chores, Alex enlists some of Kabooms Kabot's to help them out. But they quickly learn that leaving their chores in the hands of the robots results in trouble all over town!

Aunt Jenny is set to compete in the annual Greenville go-kart race, but when Kaboom hears about the prize and glory that come with winning the race, he decides to build his own go-kart by taking vehicle parts and items from all over town!

Aunt Jenny is on her way to a family hoedown in the country but is stopped when Dr. Dandelion turns the streets of Greenville into swampland! It's up to Megablast to help Aunt Jenny and Greenville return the swampy streets to normal!

After Kaboom uses his new sleeperizer to put the people of Greenville to sleep, our heroes have to save the town from sleepwalking danger! The three have to work together in a new way, as Aunt Jenny is among those in a deep slumber.

Riley helps her dad write a song but quickly learns that they have very different creative styles. Meanwhile, Metal Mike and his drones cause chaos all over town! Riley and Jon must learn to work together to rock the party and the block.

When Riley films a segment for the local news, a jealous Metal Mike takes over the airways to steal all the fans in Greenville for himself. Megablast must come together to teach Metal Mike that winning fans isn't something you can force on people!

When Riley is having a bad day, Theo and Alex try to cheer her up by getting on with what Megablast does best: write music! Meanwhile, Kaboom has a new invention that could possibly expose Rocket, Thunder, and Metallix's secret identities!

The newspaper is looking for a local Changemaker. Theo thinks Riley would be the perfect candidate! Rachel 1 learns of this and wants the front page all to herself, so she begins to drown the town with loud music, causing noise-related mayhem!

Megablast decides to try writing a disco song. Meanwhile, Starlet hatches a brilliant plan to give away free merch to help her make the comeback, but accidentally forces the town to perform her signature dance moves, whether they like it or not!

It's an exciting day for Megablast! They're about to drop their first EP! But tensions start to develop when the band can't agree on anything. After they find themselves stuck in AJ's lair, things escalate quickly, and they decide to break up!