Messy is a friendly monster who helps school-aged children by examining science questions that help them to learn more about the world that they live in.
Can Messy conquer his tummy flutters so he can perform a triple flip at the OKIDO circus?
Messy's hiccups cause a landslide while he's out on a nature walk. Will he get home?
Messy has to deliver a giant pongberry to the Pongberry Pie Festival before it goes off.
Messy, Zoom and Zim fly through the skies to track down Zim's missing weather balloons.
Messy gets pins and needles and causes chaos at the OKIDO musical statues competition.
A giant popcorn is on the loose in OKIDO. Will Messy and Zoom be able to stop it?
Messy and his friends go on a white-water adventure down the drain.
Messy goes to OKIDO and learns how to jog his memory.
Messy goes to OKIDO to find out why vacuum cleaners are so noisy.
Vicienne Volcano has an itch, and it's up to Messy to help before she blows her top.
Messy wants to run further, but he keeps getting out of breath.
Messy accidentally sets Farmer Fuddle's sheep loose.
Messy learns how food gives us energy.
After causing a mini avalanche, Messy must help Lofty dig out the entrance to his cave.
Mayor Oki wants to dress to impress the visiting mayor – with a gemstone-encrusted chain.
Mayor Oki and Geoffrey get competitive. Whose fizzy water will come out on top?
Messy Breaks the Brakes. Will Messy be able to stop a runaway float?
Messy Cake-Off. It's the Great OKIDO Cake-Off, and Messy is sure he knows how to bake the best cake.
When Stan Tall starts to develop rust, it's up to Messy to help.
Can there ever be such a thing as too much Messy? OKIDO is about to find out.
Wobbly Tower. Mayor Oki wants to build a new tower and hires Messy to be his master builder.
It's the Great OKIDO Sleepover, but there is a loud noise keeping Messy awake.
Space Cucumber. Can there ever be such a thing as too much Messy? OKIDO is about to find out.
Messy learns just how much soap is too much when he travels to the Okido launderette.
OKIDO is covered in ice, and Messy must find a way to melt it before it's too late.
Messy travels back to the start of the universe to find out where everything came from.